JPH0657676A - Apparatus for controlling after-flow of plate material - Google Patents
Apparatus for controlling after-flow of plate materialInfo
- Publication number
- JPH0657676A JPH0657676A JP22097592A JP22097592A JPH0657676A JP H0657676 A JPH0657676 A JP H0657676A JP 22097592 A JP22097592 A JP 22097592A JP 22097592 A JP22097592 A JP 22097592A JP H0657676 A JPH0657676 A JP H0657676A
- Authority
- JP
- Japan
- Prior art keywords
- flow
- plate
- wake
- plate material
- controlling
- 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.)
- Granted
Links
Landscapes
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は流体機械の機器内部流路
において生じる流れの制御を行なうことができる流れ制
御装置に関し、更に詳細には製紙機械の抄紙機ヘッドボ
ックス内の板状物体（分散部プレイト）後流の制御装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control device capable of controlling a flow generated in a flow path inside a device of a fluid machine. Part plate) The present invention relates to a downstream control device.
【０００２】[0002]
【従来の技術】一般に板状物体から流出する流体（後
流）は、板状物体後端から離脱するに伴って両端から交
互に渦（一般にカルマン渦と称せられている）を生成し
て後方に流出する。そしてその後流の乱れの減衰には物
体後端からかなりの距離を要することが知られている。
このため前述した後流の渦をなくし、流れの乱れを制御
するために、従来は図６〜図８に示すような板状物体１
の後端１ａを薄く削ぐ方法が採用されていた。2. Description of the Related Art Generally, a fluid (a wake) flowing out of a plate-like object generates vortices (generally called Karman vortices) alternately from both ends as it separates from the rear end of the plate-like object and moves backward. Spill to. It is known that it takes a considerable distance from the rear end of the object to attenuate the turbulence of the wake.
Therefore, in order to eliminate the above-mentioned vortex of the wake and control the turbulence of the flow, conventionally, the plate-like object 1 as shown in FIGS.
A method of thinly scraping the rear end 1a has been adopted.
【０００３】[0003]
【発明が解決しようとする課題】しかし板状物体１の後
端１ａを削いで薄くする従来の方法では、その削ぎ落と
しが急激な場合は流れがこの削ぎ落とし部から剥離して
後流が増大するという欠点があり、また削ぎ落としが緩
やかな場合は板状物体１の削ぎ落とし部が長く、かつ薄
くなるため流れ場の流体力で板状物体１が変形し、後流
の減衰に作用しなくなったり、破損するなどの欠点があ
った。本発明はこの物体後流に生ずるカルマン渦等によ
る流れの乱れの成長を抑制し、後流ウェークの減衰を速
やかに行ない、流速分布の一様化を促進できる板状物体
後流の制御装置を提供し、前記従来の問題を解決しよう
とするものである。However, in the conventional method in which the rear end 1a of the plate-like object 1 is shaved and thinned, when the scraping off is rapid, the flow is separated from the scraping off part and the wake increases. When the scraping off is gentle, the scraping off part of the plate-like object 1 becomes long and thin, so that the plate-like object 1 is deformed by the fluid force of the flow field and acts on the damping of the wake. There were drawbacks such as disappearance and damage. The present invention suppresses the growth of flow turbulence due to Karman vortices or the like generated in the wake of the object, promptly attenuates the wake of the wake, and controls the wake of a plate-like object that can promote uniformization of the flow velocity distribution. The present invention aims to provide the above-mentioned conventional problems.
【０００４】[0004]
【課題を解決するための手段】このため本発明は、板状
物体の後端部を細分割すると共に、夫々の先端部におい
て断面形状が略円形断面となるように形成し、かつその
先端を板状面から斜めに交互に削いでなるもので、これ
を課題解決のための手段とするものである。Therefore, according to the present invention, the rear end portion of a plate-like object is subdivided, and each of the front end portions is formed to have a substantially circular cross-sectional shape, and the front end thereof is formed. The plate-shaped surface is shaved alternately, and this is used as a means for solving the problem.
【０００５】[0005]
【作用】本発明の板状物体後流の制御装置は板状物体の
後端部を細分割し、かつ夫々を円形断面に形成し、更に
先端部を交互に反対方向に削いで構成されている。この
ため流出した流れは互いに干渉し合い、後流ウェークの
成長を抑制できる。The controller for the wake of a plate-like object according to the present invention is configured by subdividing the rear end of the plate-like object and forming each into a circular cross section, and further cutting the tip end alternately in opposite directions. There is. For this reason, the flows that have flowed out interfere with each other, and the growth of wakes can be suppressed.
【０００６】[0006]
【実施例】以下本発明を図面の実施例について説明する
と、図１は板状物体、即ち、抄紙機ヘッドボックス内の
分散プレイトの平面図、図２は図１のＡ〜Ａ断面図、図
３は図１のＢ〜Ｂ断面図である。図１において１は板状
物体（分散プレイト）であり、この板状物体１の一端ａ
は流体流入部として、また他端ｂは流体流出部として形
成されている。板状物体１の他端ｂの流体流出部は、後
方（図中右方）に行くに従って細く形成された分割部２
によって細分化されており、この分割部２の先端部は削
ぎ落とし面３が交互に相反する方向に向くように削ぎ落
とされている。前述の分割部２内に形成される流路は図
３に示すように断面が円柱体４となるように構成されて
いる。1 is a plan view of a plate-like object, that is, a dispersion plate in a head box of a paper machine, and FIG. 2 is a sectional view taken along line AA of FIG. 3 is a sectional view taken along line BB of FIG. In FIG. 1, 1 is a plate-like object (dispersed plate), and one end a of this plate-like object 1
Is formed as a fluid inflow portion, and the other end b is formed as a fluid outflow portion. The fluid outflow portion at the other end b of the plate-like object 1 has a divided portion 2 which is formed to be thinner toward the rear (right side in the figure).
The ends of the divided portions 2 are cut off so that the cut-off surfaces 3 are alternately oriented in opposite directions. The flow path formed in the above-mentioned division part 2 is configured so that the cross section becomes a cylindrical body 4 as shown in FIG.
【０００７】以上のように本発明に係る板状物体後流の
制御装置は、板状物体１の後端に設けられた複数個の円
柱体４の先端の削ぎ落とし面３が交互に相反する方向に
向くよう形成されている。このためそれらの削ぎ落とし
面（傾斜面）３に形成される対の縦渦の旋回方向は図５
に示すように異なったものとなる。即ち、円柱体４の後
端を斜めに削ぎ落とすと、物体に沿う流れは図４に示す
ように斜面の面側から内側に巻込むような対の縦渦を誘
起する。従って板状物体１の後端を先端の削ぎ落とされ
た円柱体４で構成すると二次元的なカルマン渦がなくな
り、小さな縦渦が生成される。この旋回方向の異なる対
の縦渦は流出した後流で相互に干渉して打ち消し合い、
容易に消滅する。この作用によって後流ウェークの成長
は抑えられ、流速分布の一様化、後流の制御に効果が発
揮される。As described above, in the controller for controlling the wake of a plate-like object according to the present invention, the scraped-off surfaces 3 at the tips of a plurality of cylindrical bodies 4 provided at the rear end of the plate-like object 1 alternate with each other. It is formed so as to face the direction. Therefore, the turning direction of the pair of vertical vortices formed on the scraped-off surface (slope) 3 is shown in FIG.
It will be different as shown in. That is, when the rear end of the cylindrical body 4 is cut off obliquely, the flow along the object induces a pair of longitudinal vortices that are wound inward from the surface side of the slope as shown in FIG. Therefore, if the rear end of the plate-like object 1 is composed of the cylindrical body 4 with the tip cut off, the two-dimensional Karman vortex disappears and a small vertical vortex is generated. This pair of vertical vortices with different swirling directions interfere with each other in the wake that flows out and cancel each other out.
It easily disappears. This action suppresses the growth of the wakes of the wake, and is effective in uniforming the flow velocity distribution and controlling the wake.
【０００８】[0008]
【発明の効果】以上詳細に説明した如く本発明は、先端
の分割部を板状面から斜めに交互に削いだことにより、
板状物体から流出する流れを互いに干渉させ合うことが
でき、後流ウェークの成長を抑制できるため、板状物体
から流出する流体の流速分布を均一化でき、後流の制御
に効果を発揮することができるという優れた効果を奏す
るものである。As described in detail above, according to the present invention, the divided portions at the tip are shaved alternately from the plate-like surface,
Since the flows flowing out of the plate-shaped object can interfere with each other and the growth of the wake wake can be suppressed, the flow velocity distribution of the fluid flowing out of the plate-shaped object can be made uniform, which is effective in controlling the wake. It has an excellent effect of being able to.
【図１】本発明の実施例に係る板状物体後流の制御装置
の平面図である。FIG. 1 is a plan view of a wake control device for plate-like objects according to an embodiment of the present invention.
【図２】図１のＡ〜Ａ断面図である。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】図１のＢ〜Ｂ断面図である。FIG. 3 is a sectional view taken along line BB of FIG.
【図４】円柱後端斜面域の縦渦の流れを示す説明図であ
る。FIG. 4 is an explanatory diagram showing a flow of a vertical vortex in a rear end slope area of a cylinder.
【図５】削ぎ落とし方向の異なる円柱体斜面縦渦の旋回
方向を表わす説明図である。FIG. 5 is an explanatory diagram showing a turning direction of a vertical vortex of a cylindrical body having different scraping directions.
【図６】従来の板状物体を示す平面図である。FIG. 6 is a plan view showing a conventional plate-shaped object.
【図７】図６のＣ〜Ｃ断面図である。FIG. 7 is a sectional view taken along line CC of FIG.
【図８】図６のＤ〜Ｄ断面図である。FIG. 8 is a sectional view taken along line D-D in FIG.
１ 板状物体 ２ 分割部 1 Plate-like object 2 Divided part
Claims (1)
夫々の先端部において断面形状が略円形断面となるよう
に形成し、かつその先端を板状面から斜めに交互に削い
でなることを特徴とする板状物体後流の制御装置。1. A rear end portion of a plate-like object is subdivided, and
A controller for a wake of a plate-like object, characterized in that each tip part is formed so as to have a substantially circular cross-sectional shape, and the tips are alternately and obliquely cut from a plate-like surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22097592A JP2961020B2 (en) | 1992-07-29 | 1992-07-29 | Control device for wake of plate-shaped object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22097592A JP2961020B2 (en) | 1992-07-29 | 1992-07-29 | Control device for wake of plate-shaped object |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0657676A true JPH0657676A (en) | 1994-03-01 |
| JP2961020B2 JP2961020B2 (en) | 1999-10-12 |
Family
ID=16759505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22097592A Expired - Fee Related JP2961020B2 (en) | 1992-07-29 | 1992-07-29 | Control device for wake of plate-shaped object |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2961020B2 (en) |
-
1992
- 1992-07-29 JP JP22097592A patent/JP2961020B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2961020B2 (en) | 1999-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990629 |
|
| LAPS | Cancellation because of no payment of annual fees |