JPH05281084A - Low temperature wind channel - Google Patents
Low temperature wind channelInfo
- Publication number
- JPH05281084A JPH05281084A JP11075292A JP11075292A JPH05281084A JP H05281084 A JPH05281084 A JP H05281084A JP 11075292 A JP11075292 A JP 11075292A JP 11075292 A JP11075292 A JP 11075292A JP H05281084 A JPH05281084 A JP H05281084A
- Authority
- JP
- Japan
- Prior art keywords
- low temperature
- chamber
- plenum chamber
- wind tunnel
- nitrogen gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、低温風洞に関するもの
である。FIELD OF THE INVENTION The present invention relates to a low temperature wind tunnel.
【０００２】[0002]
【従来の技術】近年、航空宇宙産業での航空機の高速
化、大型化に伴い、従来の遷音速風洞及び低速風洞では
高レイノルズ数領域での流体力学的検討が十分に行えな
くなっている。2. Description of the Related Art In recent years, with the increase in speed and size of aircraft in the aerospace industry, conventional transonic wind tunnels and low speed wind tunnels have been unable to perform sufficient hydrodynamic studies in the high Reynolds number region.
【０００３】この為、風洞本体内に液体窒素を散布して
低温窒素ガスとし、該低温窒素ガスを前記風洞本体内で
回流させることにより比較的小型、低圧力の条件で高レ
イノルズ数領域での遷音速実験を行うことができる低温
風洞の開発が各国で進められている。For this reason, liquid nitrogen is sprinkled into the wind tunnel main body to obtain low temperature nitrogen gas, and the low temperature nitrogen gas is circulated in the wind tunnel main body, so that it is relatively small in size and low in pressure and in a high Reynolds number region. Development of low-temperature wind tunnels capable of conducting transonic experiments is underway in each country.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
低温風洞では、風洞本体内を低温状態に保持したまま測
定部に作業員が直接出入りして模型等の供試体の交換を
行えるものがなく、プレナムチャンバ及び風洞本体内を
常温空気と置換してから作業員がプレナムチャンバ内に
侵入して測定部の供試体を交換するようにしていた為、
前記プレナムチャンバ及び風洞本体を再度低温窒素ガス
雰囲気に戻して実験を再開し得る状態に復帰するのに多
大な時間が必要となり、様々な供試体を使った実験を能
率良く行うことができなかった。However, in the conventional low-temperature wind tunnel, there is no conventional low-temperature wind tunnel in which a worker can directly go in and out of the measurement unit to exchange a test piece such as a model while keeping the inside of the wind tunnel main body in a low temperature state. Since the inside of the plenum chamber and the wind tunnel main body was replaced with room temperature air, a worker invaded the plenum chamber to replace the specimen of the measurement unit,
It took a long time to return the plenum chamber and the wind tunnel main body to the low temperature nitrogen gas atmosphere again and to be able to restart the experiment, and it was not possible to efficiently perform the experiment using various specimens. ..
【０００５】又、低温となっている風洞本体内に常温空
気が入ると、該空気中に含まれる水分が風洞本体の風路
内周面に霜となって付着し、この霜が実験を再開した際
に低温窒素ガスに同伴されて流れ、実験に悪影響を及ぼ
す虞れがあった。When room temperature air enters the body of the wind tunnel at a low temperature, the moisture contained in the air adheres to the inner peripheral surface of the air passage of the wind tunnel as frost, and the frost restarts the experiment. At that time, there was a risk that it would flow along with the low temperature nitrogen gas and adversely affect the experiment.
【０００６】本発明は上述の実情に鑑みてなしたもの
で、風洞本体内を低温状態に保持したまま測定部に作業
員が直接出入りして供試体の交換作業等を行うことがで
きる低温風洞を提供することを目的としている。The present invention has been made in view of the above-mentioned circumstances, and a low temperature wind tunnel in which a worker can directly go in and out of a measurement unit and perform a work of exchanging a specimen while the inside of the wind tunnel main body is kept in a low temperature state. Is intended to provide.
【０００７】[0007]
【課題を解決するための手段】本発明は、供試体を収容
する為の測定部を包囲するプレナムチャンバと、前記測
定部に対し低温窒素ガスを内部の風路を通して循環回流
し得るよう前記プレナムチャンバに接続された風洞本体
と、前記プレナムチャンバ内における測定部の上流側及
び下流側にて前記測定部と風洞本体の風路とを夫々遮断
して風洞本体内を気密に保持し得る仕切装置と、前記測
定部の側面に臨むよう前記プレナムチャンバ側部に貫通
接続され且つ内部にプレナムチャンバ側から順に低温室
と常温室を耐圧扉を介して区画形成したアクセストンネ
ルと、前記プレナムチャンバ及び低温室に酸素ガス導入
流路を介して接続した酸素ガス供給装置と、前記プレナ
ムチャンバ及び低温室に窒素ガス導入流路を介して接続
した窒素ガス供給装置と、前記プレナムチャンバ及び低
温室に排気流路を介して接続した排気装置とを備えたこ
とを特徴とする低温風洞に係るものである。According to the present invention, there is provided a plenum chamber for enclosing a measuring portion for accommodating a specimen, and the plenum so that low-temperature nitrogen gas can be circulated to the measuring portion through an internal air passage. A wind tunnel main body connected to the chamber, and a partitioning device capable of keeping the inside of the wind tunnel main body airtight by respectively blocking the measurement unit and the air passage of the wind tunnel main body on the upstream side and the downstream side of the measurement section in the plenum chamber. An access tunnel penetratingly connected to the side of the plenum chamber so as to face the side surface of the measuring unit and internally forming a low temperature room and a room temperature room through pressure doors from the plenum chamber side, the plenum chamber and the low temperature chamber. Oxygen gas supply device connected to the chamber via an oxygen gas introduction flow path, and nitrogen gas supply connected to the plenum chamber and the low temperature chamber via a nitrogen gas introduction flow path And location, but according to the cold air channel, characterized in that a said plenum chamber and an exhaust device connected through the exhaust passage to the cold room.
【０００８】[0008]
【作用】従って本発明では、作業員が測定部に入る場合
に、各仕切装置を夫々閉作動して測定部と風洞本体の風
路とを遮断して風洞本体内を気密に保持し、然る後、予
め窒素ガス雰囲気になっているプレナムチャンバと低温
室とに常温の酸素ガスを２０％ｖｏｌ程度混入する。Therefore, according to the present invention, when the worker enters the measuring section, each partitioning device is closed to shut off the measuring section and the air passage of the wind tunnel body to keep the inside of the wind tunnel body airtight. After that, about 20% vol of oxygen gas at room temperature is mixed into the plenum chamber and the low temperature chamber which are previously in a nitrogen gas atmosphere.
【０００９】作業員は先ず耐圧扉を開けて常温室に入
り、体表面から放出される水分をできるだけ取った後に
低温室に入り、プレナムチャンバ内が酸欠でないことを
確認して耐圧扉を開けてプレナムチャンバ内に侵入し、
例えば測定部側面の一部を取り外して供試体の交換作業
等を行う。The worker first opens the pressure-resistant door to enter the room temperature chamber, removes as much water released from the body surface as possible, and then enters the low-temperature chamber to confirm that the plenum chamber is not oxygen-deficient and opens the pressure-resistant door. Enter the plenum chamber,
For example, a part of the side surface of the measurement unit is removed to perform the work of replacing the specimen.
【００１０】供試体の交換作業等が完了したら、前記取
り外した測定部側面の一部を再び取り付け、低温室に入
って耐圧扉を閉め、作業員が低温室に入ったことを確認
した後に、プレナムチャンバ内に窒素ガスを供給して酸
素ガスを混入された室内のガスを排気流路から排気し、
前記プレナムチャンバ内を窒素ガス雰囲気に戻す。After the replacement work of the specimen is completed, a part of the side surface of the removed measuring section is reattached, the low temperature chamber is closed and the pressure door is closed, and after confirming that the worker has entered the low temperature chamber, Supplying nitrogen gas into the plenum chamber, exhausting the gas in the room mixed with oxygen gas from the exhaust flow path,
The inside of the plenum chamber is returned to a nitrogen gas atmosphere.
【００１１】次いで、プレナムチャンバ内が窒素ガス雰
囲気に戻ったことを確認した後に各仕切装置を開け、新
たに液体窒素を風洞本体内に散布して予冷を行った後に
実験を再開する。Next, after confirming that the inside of the plenum chamber has returned to the nitrogen gas atmosphere, each partitioning device is opened, liquid nitrogen is newly sprinkled in the main body of the wind tunnel to perform precooling, and then the experiment is restarted.
【００１２】又、作業員が断熱建屋の外部に退出した後
には、前記プレナムチャンバの場合と同様にして低温室
内を窒素ガス雰囲気に置換しておく。After the worker leaves the heat insulating building, the low temperature chamber is replaced with a nitrogen gas atmosphere in the same manner as in the plenum chamber.
【００１３】[0013]
【実施例】以下本発明の実施例を図面を参照しつつ説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】図１〜図５は本発明の一実施例を示すもの
で、図中１は測定部２を包囲するプレナムチャンバ、３
は前記測定部２に対し低温窒素ガス４を内部の風路５を
通して循環回流し得るよう前記プレナムチャンバ１に接
続された風洞本体を示し、該風洞本体３は第１拡散胴
６、第１屈曲胴７、第１平行胴８、第２屈曲胴９、第２
平行胴１０、第３平行胴１１、第２拡散胴１２、第３屈
曲胴１３、第４平行胴１４、第４屈曲胴１５を略矩形状
に連結して構成されており、前記第２平行胴１０内には
前記低温窒素ガス４を図１における左回りに回流する為
の送風機１６が配設されている。1 to 5 show an embodiment of the present invention, in which 1 is a plenum chamber surrounding a measuring part 2 and 3 is a plenum chamber.
Indicates a wind tunnel main body connected to the plenum chamber 1 so that the low temperature nitrogen gas 4 can be circulated and circulated to the measuring unit 2 through an internal air duct 5, and the wind tunnel main body 3 includes a first diffusion cylinder 6 and a first bend. Body 7, first parallel body 8, second bent body 9, second
The parallel cylinder 10, the third parallel cylinder 11, the second diffusion cylinder 12, the third bending cylinder 13, the fourth parallel cylinder 14, and the fourth bending cylinder 15 are connected in a substantially rectangular shape, and the second parallel cylinder is used. An air blower 16 for circulating the low-temperature nitrogen gas 4 counterclockwise in FIG. 1 is arranged in the body 10.
【００１５】前記プレナムチャンバ１内における測定部
２の上流側（図１中左側）には、前記第４屈曲胴１５か
ら導入される低温窒素ガス４を収縮して測定部２に導く
縮流ノズル１７が配設されており、前記測定部２の下流
側（図１中右側）には、前記第１拡散胴６の上流側端部
（小径側端部）が挿入配置されていて、該第１拡散胴６
の上流側端部には、測定部２から送出される低温窒素ガ
ス４を良好に回収する為のディフューザ１８、及び模型
等の供試体１９をセンサ類（図示せず）と一緒に測定部
２に挿入して支持する為のストラット２０が備えられて
いる（図４参照）。On the upstream side (left side in FIG. 1) of the measuring section 2 in the plenum chamber 1, a contraction nozzle for contracting the low temperature nitrogen gas 4 introduced from the fourth bending cylinder 15 and guiding it to the measuring section 2. 17 is disposed, and the upstream end (small diameter side end) of the first diffusion cylinder 6 is inserted and disposed on the downstream side (right side in FIG. 1) of the measurement unit 2. 1 diffusion cylinder 6
A diffuser 18 for favorably collecting the low-temperature nitrogen gas 4 sent from the measuring unit 2 and a specimen 19 such as a model are provided at the upstream end of the measuring unit 2 together with sensors (not shown). Struts 20 for inserting and supporting the struts are provided (see FIG. 4).
【００１６】更に、前記プレナムチャンバ１内における
縮流ノズル１７と測定部２との間、及び前記第１拡散胴
６の上流側端部のストラット２０より下流側位置には、
ゲート弁２１，２２（仕切装置）が夫々配設されてお
り、該各ゲート弁２１，２２により測定部２と風洞本体
３の風路５とを遮断して風洞本体３内を気密に保持し得
るようにしてある。Further, between the contraction nozzle 17 and the measuring section 2 in the plenum chamber 1 and at a position downstream of the strut 20 at the upstream end of the first diffusion cylinder 6,
Gate valves 21 and 22 (partitioning devices) are provided respectively, and the gate valves 21 and 22 shut off the measuring unit 2 and the air passage 5 of the wind tunnel main body 3 to keep the inside of the wind tunnel main body 3 airtight. I am trying to get it.
【００１７】又、前記測定部２は、プレナムチャンバ１
底部に敷設した低温窒素ガス４の流れ方向に延びるガイ
ドレール２３上に移動自在に載置されていて、通常時に
はシリンダ装置２４により前記縮流ノズル１７の下流側
端に圧接され、前記上流側のゲート弁２１を閉作動する
際には前記シリンダ装置２４によりディフューザ１８側
に移動し得るようにしてある。Further, the measuring unit 2 includes a plenum chamber 1
It is movably mounted on a guide rail 23 extending in the flow direction of the low-temperature nitrogen gas 4 laid on the bottom, and is normally pressed by a cylinder device 24 to the downstream end of the contracting nozzle 17 to be connected to the upstream side. When the gate valve 21 is closed, it can be moved to the diffuser 18 side by the cylinder device 24.
【００１８】即ち、低温風洞においては、少なくとも測
定部２に導入される低温窒素ガス４の流れを円滑に連続
する内周面の風路５で導きたいという要求がある為、上
流側のゲート弁２１を閉じる為の仕切板（図示せず）の
厚さ分の隙間が、前記ゲート弁２１を閉作動させるとき
にのみ前記測定部２の移動で生じるようにしてある。That is, in the low temperature wind tunnel, at least the flow of the low temperature nitrogen gas 4 introduced into the measuring section 2 is required to be guided by the air passage 5 on the inner peripheral surface which smoothly continues, so that the gate valve on the upstream side is required. A gap corresponding to the thickness of a partition plate (not shown) for closing 21 is created by the movement of the measuring unit 2 only when the gate valve 21 is closed.
【００１９】更に、前記プレナムチャンバ１側部の所要
位置には、該プレナムチャンバ１及び風洞本体３を取り
囲む断熱建屋２５（図５参照）の外部からプレナムチャ
ンバ１内の測定部２の側面に臨むアクセストンネル２６
が貫通接続されており、該アクセストンネル２６の内部
は耐圧扉２７ａ，２７ｂ，２７ｃによってプレナムチャ
ンバ１側から順に低温室２８と常温室２９とに区画され
ており、前記低温室２８とプレナムチャンバ１とを区画
する耐圧扉２７ａには耐圧ガラス製の観測窓３０が設け
られている。Further, at a required position on the side portion of the plenum chamber 1, the side surface of the measuring portion 2 in the plenum chamber 1 is exposed from the outside of the heat insulating building 25 (see FIG. 5) surrounding the plenum chamber 1 and the wind tunnel body 3. Access tunnel 26
Is pierced and connected, and the inside of the access tunnel 26 is partitioned into a low temperature chamber 28 and a normal temperature chamber 29 in order from the plenum chamber 1 side by pressure resistant doors 27a, 27b, 27c. An observation window 30 made of pressure-resistant glass is provided on the pressure-resistant door 27a for partitioning and.
【００２０】又、前記プレナムチャンバ１及び低温室２
８には、酸素ガス供給装置３１、窒素ガス供給装置３
２、排気装置３３が、酸素ガス導入流路３４、窒素ガス
導入流路３５、排気流路３６を介して夫々接続されてい
る。Further, the plenum chamber 1 and the low temperature chamber 2
8 is an oxygen gas supply device 31, a nitrogen gas supply device 3
2. The exhaust device 33 is connected via the oxygen gas introduction passage 34, the nitrogen gas introduction passage 35, and the exhaust passage 36, respectively.
【００２１】尚、図中３７は測定部２の側面に設けた観
察窓、３８は断熱建屋２５の保冷材を示す。In the figure, 37 is an observation window provided on the side surface of the measuring section 2, and 38 is a cold insulating material of the heat insulating building 25.
【００２２】而して、作業員が測定部２に入る場合に
は、送風機１６を停止した上で測定部２をシリンダ装置
２４によりディフューザ１８側に移動し、各ゲート弁２
１，２２を夫々閉作動して測定部２と風洞本体３の風路
５とを遮断して風洞本体３内を気密に保持する。When an operator enters the measuring unit 2, the blower 16 is stopped and the measuring unit 2 is moved to the diffuser 18 side by the cylinder device 24, and each gate valve 2 is operated.
1 and 22 are respectively closed to shut off the measuring unit 2 and the air passage 5 of the wind tunnel main body 3 to keep the inside of the wind tunnel main body 3 airtight.
【００２３】然る後、予め窒素ガス雰囲気になっている
プレナムチャンバ１と低温室２８とに常温の酸素ガスを
２０％ｖｏｌ混入する。After that, 20% vol of room temperature oxygen gas is mixed into the plenum chamber 1 and the low temperature chamber 28, which are previously in a nitrogen gas atmosphere.
【００２４】このとき、前記プレナムチャンバ１と低温
室２８の室温は露点以下（例えば−６０℃以下）になる
ように管理する。At this time, the room temperature of the plenum chamber 1 and the low temperature chamber 28 is controlled so as to be below the dew point (for example, below -60 ° C.).
【００２５】作業員は先ず耐圧扉２７ｃを開けて常温室
２９に入り、体表面から放出される水分をできるだけ取
り、次いで、耐圧扉２７ｂを開けて低温室２８に入り、
プレナムチャンバ１内が酸欠でないことを確認した後に
耐圧扉２７ａを開けてプレナムチャンバ１内に侵入し、
測定部２側面の一部を取り外して供試体１９の交換作業
を行う。The worker first opens the pressure-proof door 27c and enters the room temperature chamber 29, takes as much water as possible from the body surface, then opens the pressure-proof door 27b and enters the low temperature chamber 28,
After confirming that the inside of the plenum chamber 1 is not oxygen-deficient, the pressure resistant door 27a is opened to enter the inside of the plenum chamber 1,
A part of the side surface of the measuring unit 2 is removed and the test piece 19 is replaced.
【００２６】供試体１９の交換作業が完了したら、前記
取り外した測定部２側面の一部を再び取り付け、低温室
２８に入って耐圧扉２７ａを閉め、作業員が低温室２８
に入ったことを確認した後に、プレナムチャンバ１内に
窒素ガスを供給して酸素ガスを混入された室内のガスを
排気流路３６から排気し、前記プレナムチャンバ１内を
窒素ガス雰囲気に戻す。After the replacement work of the test piece 19 is completed, a part of the side surface of the removed measuring unit 2 is attached again, and the low temperature chamber 28 is entered to close the pressure resistant door 27a.
After confirming the entry, the nitrogen gas is supplied into the plenum chamber 1 to exhaust the gas in the chamber mixed with the oxygen gas from the exhaust passage 36, and the inside of the plenum chamber 1 is returned to the nitrogen gas atmosphere.
【００２７】次いで、プレナムチャンバ１内が窒素ガス
雰囲気に戻ったことを図示しない酸素濃度計等により確
認した後に各ゲート弁２１，２２を開け、シリンダ装置
２４により測定部２を縮流ノズル１７の下流側端に圧接
せしめ、新たに液体窒素を風洞本体３内に散布して予冷
を行った後に実験を再開する。Next, after confirming that the inside of the plenum chamber 1 has returned to the nitrogen gas atmosphere by an oxygen concentration meter (not shown) or the like, the gate valves 21 and 22 are opened, and the measuring unit 2 of the contraction nozzle 17 is opened by the cylinder device 24. The pressure is applied to the downstream end, and liquid nitrogen is newly sprinkled into the wind tunnel body 3 to perform precooling, and then the experiment is restarted.
【００２８】尚、以上の作業を行う際には、風洞本体３
の内部圧力をプレナムチャンバ１内の圧力より若干高圧
に保持して外気の混入を防止することが好ましい。When performing the above work, the wind tunnel body 3
It is preferable to keep the internal pressure of (1) slightly higher than the pressure inside the plenum chamber 1 to prevent the entry of outside air.
【００２９】又、作業員は低温室２８にて測定部２を観
測窓３０，３７から供試体１９の様子を観測しても良い
し、そのまま常温室２９を経て断熱建屋２５の外部に退
出しても良く、作業員が断熱建屋２５の外部に退出した
後には、前記プレナムチャンバ１の場合と同様にして低
温室２８内を窒素ガス雰囲気に置換しておく。Further, the worker may observe the state of the test piece 19 through the observation windows 30 and 37 of the measuring section 2 in the low temperature room 28, or may leave the room 25 through the room temperature room 29 and leave the heat insulating building 25. Alternatively, after the worker exits the heat insulating building 25, the inside of the low temperature chamber 28 is replaced with a nitrogen gas atmosphere in the same manner as in the case of the plenum chamber 1.
【００３０】又、供試体１９の交換作業時に限らず必要
時には前記と同様にして低温室２８に侵入して供試体１
９の観測が行えることは勿論である。Further, not only during the replacement work of the specimen 19, but also when it is necessary, the specimen 1 is penetrated into the low temperature chamber 28 in the same manner as described above.
Of course, 9 observations can be made.
【００３１】従って上記実施例によれば、風洞本体３内
を低温状態に保持したまま測定部２に作業員が直接出入
りして供試体１９の交換を行うことができるので、実験
を再開し得る状態に復帰する時間を従来より大幅に短縮
することができ、様々な供試体１９を使った実験を能率
良く行うことができる。Therefore, according to the above embodiment, the worker can directly go in and out of the measuring unit 2 to replace the sample 19 while keeping the inside of the wind tunnel body 3 in a low temperature state, so that the experiment can be restarted. The time required to return to the state can be greatly shortened as compared with the conventional case, and the experiments using various test pieces 19 can be efficiently performed.
【００３２】又、風洞本体３内に常温空気を侵入させる
ことなく供試体１９の交換作業等を行うことができるの
で、風洞本体３の風路５内周面に霜が付着することによ
る悪影響を防止することができる。Further, since it is possible to perform the replacement work of the sample 19 without injecting the room temperature air into the wind tunnel main body 3, there is no adverse effect due to the adhesion of frost to the inner peripheral surface of the air duct 5 of the wind tunnel main body 3. Can be prevented.
【００３３】尚、本発明の低温風洞は、上述の実施例に
のみ限定されるものではなく、本発明の要旨を逸脱しな
い範囲内において種々変更を加え得ることは勿論であ
る。The low temperature wind tunnel of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.
【００３４】[0034]
【発明の効果】上記した本発明の低温風洞によれば、下
記の如き種々の優れた効果を奏し得る。According to the above-described low temperature wind tunnel of the present invention, various excellent effects as described below can be obtained.
【００３５】（Ｉ）風洞本体内を低温状態に保持したま
ま測定部に作業員が直接出入りして供試体の交換作業等
を行うことができるので、実験を再開し得る状態に復帰
する時間を従来より大幅に短縮することができ、様々な
供試体を使った実験を能率良く行うことができる。(I) Since the worker can directly go in and out of the measuring section to perform the work of exchanging the specimen while keeping the inside of the wind tunnel at a low temperature, it takes time to return to the state where the experiment can be restarted. It can be shortened significantly compared to the past, and experiments using various specimens can be performed efficiently.
【００３６】（ＩＩ）風洞本体内に常温空気を侵入させ
ることなく供試体の交換作業等を行うことができるの
で、風洞本体の風路内周面に霜が付着することによる悪
影響を防止することができる。(II) Since it is possible to perform the work of exchanging the specimen without injecting the room temperature air into the main body of the wind tunnel, it is possible to prevent the bad influence due to the adhesion of frost to the inner circumferential surface of the wind passage of the main body of the wind tunnel. You can
【図１】本発明の一実施例の平面図である。FIG. 1 is a plan view of an embodiment of the present invention.
【図２】図１のＩＩ−ＩＩ方向の矢視図である。FIG. 2 is a view taken along line II-II in FIG.
【図３】図２のＩＩＩ−ＩＩＩ方向の矢視図である。FIG. 3 is a view in the direction of arrow III-III in FIG.
【図４】図２のプレナムチャンバの拡大断面図である。4 is an enlarged cross-sectional view of the plenum chamber of FIG.
【図５】図４のＶ−Ｖ方向の矢視図である。5 is a view in the direction of VV in FIG.
１ プレナムチャンバ ２ 測定部 ３ 風洞本体 ４ 低温窒素ガス ５ 風路 １９ 供試体 ２１ ゲート弁（仕切装置） ２２ ゲート弁（仕切装置） ２６ アクセストンネル ２７ａ 耐圧扉 ２７ｂ 耐圧扉 ２７ｃ 耐圧扉 ２８ 低温室 ２９ 常温室 ３１ 酸素ガス供給装置 ３２ 窒素ガス供給装置 ３３ 排気装置 ３４ 酸素ガス導入流路 ３５ 窒素ガス導入流路 ３６ 排気流路 1 Plenum chamber 2 Measurement part 3 Wind tunnel main body 4 Low temperature nitrogen gas 5 Air passage 19 Specimen 21 Gate valve (dividing device) 22 Gate valve (dividing device) 26 Access tunnel 27a Pressure resistant door 27b Pressure resistant door 27c Pressure resistant door 28 Low greenhouse 29 Normal temperature Chamber 31 Oxygen gas supply device 32 Nitrogen gas supply device 33 Exhaust device 34 Oxygen gas introduction flow path 35 Nitrogen gas introduction flow path 36 Exhaust flow path
Claims (1)
プレナムチャンバと、前記測定部に対し低温窒素ガスを
内部の風路を通して循環回流し得るよう前記プレナムチ
ャンバに接続された風洞本体と、前記プレナムチャンバ
内における測定部の上流側及び下流側にて前記測定部と
風洞本体の風路とを夫々遮断して風洞本体内を気密に保
持し得る仕切装置と、前記測定部の側面に臨むよう前記
プレナムチャンバ側部に貫通接続され且つ内部にプレナ
ムチャンバ側から順に低温室と常温室を耐圧扉を介して
区画形成したアクセストンネルと、前記プレナムチャン
バ及び低温室に酸素ガス導入流路を介して接続した酸素
ガス供給装置と、前記プレナムチャンバ及び低温室に窒
素ガス導入流路を介して接続した窒素ガス供給装置と、
前記プレナムチャンバ及び低温室に排気流路を介して接
続した排気装置とを備えたことを特徴とする低温風洞。1. A plenum chamber surrounding a measuring unit for housing a specimen, and a wind tunnel main body connected to the plenum chamber so that low-temperature nitrogen gas can be circulated around the measuring unit through an internal air passage. A partitioning device that can keep the inside of the wind tunnel body airtight by blocking the measurement unit and the air passage of the wind tunnel main body on the upstream side and the downstream side of the measurement unit in the plenum chamber, and on the side surface of the measurement unit. An access tunnel penetratingly connected to the side of the plenum chamber so as to face it and internally forming a low temperature chamber and a room temperature chamber from the plenum chamber side through a pressure door, and an oxygen gas introduction flow path in the plenum chamber and the low temperature chamber. An oxygen gas supply device connected via the nitrogen gas supply device connected to the plenum chamber and the low temperature chamber via a nitrogen gas introduction flow path,
A low temperature wind tunnel, comprising: an exhaust device connected to the plenum chamber and the low temperature chamber via an exhaust flow path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11075292A JPH05281084A (en) | 1992-04-03 | 1992-04-03 | Low temperature wind channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11075292A JPH05281084A (en) | 1992-04-03 | 1992-04-03 | Low temperature wind channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05281084A true JPH05281084A (en) | 1993-10-29 |
Family
ID=14543665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11075292A Pending JPH05281084A (en) | 1992-04-03 | 1992-04-03 | Low temperature wind channel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05281084A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0368203A2 (en) * | 1988-11-08 | 1990-05-16 | Asahi Glass Company Ltd. | Method for recovering sulfuric acid from a titanium sulfate waste liquor |
-
1992
- 1992-04-03 JP JP11075292A patent/JPH05281084A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0368203A2 (en) * | 1988-11-08 | 1990-05-16 | Asahi Glass Company Ltd. | Method for recovering sulfuric acid from a titanium sulfate waste liquor |
| US5062960A (en) * | 1988-11-08 | 1991-11-05 | Asahi Glass Company, Ltd. | Method and apparatus for recovering an acid from an acid-containing waste liquor |
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