JP3733415B2

JP3733415B2 - Smoke blower

Info

Publication number: JP3733415B2
Application number: JP23361599A
Authority: JP
Inventors: 孝男菊池
Original assignee: Japan Science and Technology Agency; Japan Aerospace Exploration Agency JAXA; National Institute of Japan Science and Technology Agency
Current assignee: Japan Science and Technology Agency; Japan Aerospace Exploration Agency JAXA; National Institute of Japan Science and Technology Agency
Priority date: 1999-08-20
Filing date: 1999-08-20
Publication date: 2006-01-11
Anticipated expiration: 2019-08-20
Also published as: JP2001056267A

Description

【０００１】
【発明の属する技術分野】
本発明は、風洞内での煙による流体の可視化等に用いる煙吹出装置に関するものであり、さらに詳細には、風洞内において煙を上下均一に吹き出すことができる煙吹出装置に関するものである。
【０００２】
【従来の技術】
従来は、風洞内での煙による流体の可視化等に用いる煙吹出装置は、支柱の一端から煙を供給し、支柱の上下方向に形成したスリット等からなる煙吹出口から風洞内に向けて煙を吹出しする構成となっている。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来の煙吹出装置は支柱内にダクトが１本形成されているだけであり、このダクトの一端側から煙を供給する構成となっているために、煙供給口に近いほど煙吹出口からの煙吹出量が多くなり、支柱の上下に渡って均一に煙を吹出すことができなかった。従って、風洞内の上下方向での煙吹出量が異なり、流体の可視化の点で不十分であった。また、風洞の中で煙供給ホースを煙吹出支柱の側面に接続すると接続点より煙吹出支柱の側面上に渦状乱流境界線が発生し煙の流れを乱してしまい、流体の可視化の点で不十分であった。
【０００４】
そこで、本発明は、ダクト全長に形成した煙吹出用開口から煙吹出口に向けて煙を均一に吹き出すことができるようにするために、煙供給管とダクトとの間に流れの抵抗体（多孔板、網等）を設けるとともに、煙吹出用開口を有するダクトの両端から煙を供給できる煙吹出装置を提供することにより、上記問題点を解決することを目的とする。また、煙吹出支柱の側面の煙供給ホース接続点より発生する渦状乱流境界線を防止するために、前記ホース接続点の上部に境界層分離板を備えた煙吹出装置を提供することにより、上記問題点を解決することを目的とする。
【０００５】
本発明は、煙供給管に流れの抵抗体を介して連通する２本のダクトと、この２本のダクトの端部を連通する通路と、一方のダクトの略全長に渡って形成された煙吹出用開口とを備えており、煙は煙供給管から流れの抵抗体を通って２本のダクトに入る。この２本のダクトに流れ込んだ煙は、煙吹出用開口を有するダクトの両端から煙吹出用開口に向かって流れだし、同開口と連通する煙吹出支柱の煙吹出口から均一に吹出される。なお、ダクトに形成した煙吹出用開口には必要に応じて流れの抵抗体を設けることができる。
【０００６】
前記流れの抵抗体は気流の乱れを小さくする機能を有しており、アルミハニカム、整流網、多孔体等の整流要素で構成することができる。さらに、煙吹出支柱に形成する煙吹出口の形態は細い径のパイプ、小径の孔を開ける、スリットからコアンダ効果を利用して吹き出す、または、煙吹出支柱の後縁のスリットからシート状の煙を吹き出す構造等がある。
【０００７】
【発明が解決しようとする課題】
このため、本発明が採用した技術解決手段は、
【請求項１】煙供給管４と、前記煙供給管に連通した２本のダクト５、６と、煙吹出口３を有する煙吹出支柱２とを備え、前記２本のダクトの一端側は流れの抵抗体７を介して前記煙供給管４と連通されており、前記２本のダクトの他端側はダクト同志が連通されており、さらに前記２本のダクトのうち一方のダクト６には流れの抵抗体を有する煙吹出用開口９を設け、このダクトの煙吹出用開口９と前記煙吹出支柱２に備えた前記煙吹出口３とを連通したことを特徴とする煙吹出装置である。
また、前記ダクトに設けた流れの抵抗体を有する煙吹出用開口は、ダクトの略全長に渡って設けたことを特徴とする煙吹出装置である。
また、前記２本のダクトは、煙吹出支柱内に形成したことを特徴とする煙吹出装置である。
また、前記煙吹出支柱は、煙吹出支柱の側面に形成したスリットから、コアンダ効果により煙を吹出すことができるようにしたことを特徴とする煙吹出装置である。
また、前記煙吹出支柱は、上下方向に所定の間隔を持って配置した煙吹出口から煙を吹出すことができるようにしたことを特徴とする煙吹出装置である。
また、前記流れの抵抗体は多孔板、網、ハニカム等の整流要素のいずれか一つまたはそれらの組み合わせから構成されていることを特徴とする煙吹出装置である。
また、前記煙吹出支柱は、翼型断面形状を有する煙吹出支柱の後縁部に形成したスリット状の煙吹出口１２からシート状の煙を吹き出すことができるようにしたことを特徴とする煙吹出装置である。
また、前記２本のダクトの内、前記煙吹出用開口９の無いダクト５の代わりに、前記煙吹出用開口９を有するダクト６の両端に直接煙供給用ホース１３、１５を接続し、ダクト６の上部に流れの抵抗体１７を備え、前記煙供給用ホースから供給した煙を流れの抵抗体７、１７を介して前記煙吹出用開口９から煙を吹き出すようにしたことを特徴とする煙吹出装置である。
また、風洞内で、翼型断面形状を有する煙吹出支柱の側面から、前記煙供給管４に煙を供給するホースを接続する場合、又は、翼型断面形状を有する煙吹出支柱の側面に前記煙供給用ホース１３、１５を接続する場合にホースの接続点の上部に境界層分離板を備えて渦状乱流境界線の発生を防止することを特徴とする煙吹出装置である。
【０００８】
【実施の形態】
以下、本発明における煙吹出装置の実施の形態を図面に基づいて説明する。
図１は第１実施形態としての煙吹出装置の側面図、図２は同煙吹出装置の一部破断断面図、図３は図１中のＡ−Ａ断面図である。
【０００９】
図１において、煙吹出装置２０は煙を導入する導入口１と、煙を吹出すための煙吹出口３とを備えており、煙吹出支柱２は図に示すように上下方向に煙吹出口としてのスリット３が形成されている。導入口１から供給された煙は後述する煙吹出支柱２内の流路１１を介してスリット３全長からコアンダ効果を利用して均一に吹き出されることになる。
【００１０】
図２において煙吹出装置２０は、煙導入口１を有する煙供給管４を備えており、この煙供給管４には２本のダクト５、６が取り付けれており、２本のダクト５、６はアルミハニカム、整流網、多孔体等からなる流れの抵抗体７を介して煙供給管４と連通されている。２本のダクト５、６は図中上方において通路８により連通しており、また２本のダクト５、６のうち１本のダクト６には、略全長にわたって煙吹出用開口９が形成され、この開口９にもアルミハニカム、整流網、多孔体等からなる流れの抵抗体１０が必要に応じて取り付けられている。
【００１１】
２本のダクト５、６は、側面に煙吹出口としてのスリット３を有する断面が翼型（図３参照）をしている煙吹出支柱２の内に形成されており、スリット３は煙吹出支柱２の上下方向に渡って所定の長さに形成され、このスリット３は煙吹出支柱２内に形成している流路１１を介して、前記ダクト６に形成した煙吹出用開口９に連通している。
【００１２】
上記構成からなる煙吹出装置２０では、煙は煙供給管４から流れの抵抗体７を通って２本のダクト５、６に入る。この２本のダクト５、６に流れ込んだ煙は、煙吹出用開口９を有するダクト６の両端から煙吹出用開口９に向かって流れだし、同開口９に設けた抵抗体１０を介して煙吹出支柱２内の流路１１に均一に流れだす。流路１１内に流れた煙は煙吹出支柱２に形成したスリット３からコアンダ効果によりスリット３全長から均一に吹き出される。
【００１３】
この煙の流れにおいて、煙は煙供給管４より流れの抵抗体７（多孔板、網等）を通り２本のダクト５、６に入ったのち、ダクト６では煙を流路１１に吹き出しているので上部に向かって内圧が低くなる。一方ダクト５では煙を吹き出していないので上部の内圧はダクト６の上部よりも高いので煙はダクト５からダクト６に流れ込みダクト６の上下の圧力差を小さくする。このため、ダクト６から流路１１に吹き出る上下の煙の吹出量の均一化が改善される。
ここで流れの抵抗体７と１０はダクト５、６内の流速を小さくすることにより圧力の均一化を促進し、又、流れを均等に拡散する作用をしている。
また、流路１１は気流の乱れを小さくする部分で中にはアルミハニカム、整流網等の整流要素を装着する。
【００１４】
つづいて、本発明の第２実施形態の説明をする。
図４は第２実施形態としての煙吹出装置の側面図、図５は同煙吹出装置の拡大破断断面図、図６は図４中のＢ−Ｂ断面図である。
【００１５】
この実施形態は前述した第１実施形態のスリット３の代わりに、上下方向に多数の煙吹出口３Ａを有する煙吹出支柱２を使用した点で第１実施形態と異なっている。なお第１実施形態と同じ符号の部材は同一部材を指している。
煙吹出支柱２は図５に示すように煙吹出支柱２内の流路１１に連通する多数の煙吹出口３Ａを備えており、また煙供給管４に連通する２本のダクト５、６を備えている。２本のダクト５、６はアルミハニカム、整流網、多孔体等からなる流れの抵抗体７を介して煙供給管４と連通されている。２本のダクト５、６は図中上方において通路８により連通しており、また２本のダクト５、６のうち１本のダクト６には、略全長にわたって煙吹出用開口９が形成され、この開口にもアルミハニカム、整流網、多孔体等からなる流れの抵抗体１０が取り付けられている。
【００１６】
上記構成からなる煙吹出装置２０では、煙は煙供給管４から流れの抵抗体７を通って２本のダクト５、６に入る。この２本のダクト５、６に流れ込んだ煙は、煙吹出用開口９を有するダクト６の両端から煙吹出用開口９に向かって流れだし、同開口９に設けた抵抗体１０を介して煙吹出支柱２内の流路１１に均一に流れだす。流路１１内に流れた煙は煙吹出支柱２に形成した多数の煙吹出口３Ａから均一に吹き出される。
【００１７】
つづいて、本発明の第３実施形態の説明をする。
図７は第３実施形態としての煙吹出装置の鳥瞰図、図８は同煙吹出装置の一部破断側面図である。
この実施形態は前述した第１実施形態のスリット３の代わりに、上下方向に煙吹出用のスリット１２を後縁に持っている煙吹出支柱２を使用するとともに２本のダクトの代わりにダクト１本とし、２本目のダクトの代わりにホースを使用した点で第１実施形態と異なっている。なお第１実施形態と同じ符号の部材は同一部材を指している。
煙吹出支柱２は図７、図８に示すように煙吹出支柱２内の流路１１に連通する煙吹出口としてのスリット１２を備えており、また煙供給用のホース１３、１４に連通するダクト６を備えている。ダクト６の図中上端はアルミハニカム、整流網、多孔体等からなる流れの抵抗体１７を介して煙供給用のホース１５と、またダクト６の図中下端はアルミハニカム、整流網、多孔体等からなる流れの抵抗体７を介して煙供給用のホース１３と連通されている。ダクト６には、略全長にわたって煙吹出用開口９が形成され、この開口にもアルミハニカム、整流網、多孔体等からなる流れの抵抗体１０が取り付けられている。
【００１８】
上記構成からなる煙吹出装置では、煙は煙供給用ホース１３、１４から流れの抵抗体７、１７を通ってダクト６に入る。このダクト６に流れ込んだ煙は、煙吹出用開口９に設けた抵抗体１０を介して煙吹出支柱２内の流路１１に均一に流れ出す。流路１１に流れた煙は煙吹出支柱２の後縁に形成した煙吹出口としてのスリット１２から上下均一に吹き出される。
【００１９】
つづいて、本発明の第４実施形態の説明をする。
図９は第４実施形態としての煙吹出装置の側面図、図１０は同煙吹出装置の一部破断側面図、図１１は図９のＣ−Ｃ断面図である。
この実施形態は第１実施形態の２本のダクトの代わりにダクト１本とし、２本目のダクトの代わりにホースを使用した点で第１実施形態と異なっている。なお第１実施形態と同じ符号の部材は同一部材を指している。
煙吹出支柱２は図１０に示すように煙吹出支柱２内の流路１１に連通する煙吹出口としてのスリット３を備えており、またダクト６の両端に連通する２本の煙供給用のホース１３、１５を備えている。１本のダクト６は両端においてアルミハニカム、整流網、多孔体等からなる流れの抵抗体７、１７を介して煙供給ホース１３、１５と連通している。ダクト６には略全長に渡って煙吹出用開口９が形成され、この開口にもアルミハニカム、整流網、多孔体等からなる流れの抵抗体１０が取り付けられている。
【００２０】
上記構成からなる煙吹出装置では、煙は煙供給用の２本のホース１３、１５から流れの抵抗体７、１７を通って１本のダクト６の両端からダクト６に入る。この１本のダクト６に流れ込んだ煙は、ダクト６の両端から煙吹出用開口９に向かって流れ出し、同開口９に設けた抵抗体１０を介して煙吹出支柱２内の流路１１に均一に流れ出す。流路１１に流れた煙は煙吹出支柱２の側面に形成した煙吹出口としてのスリット３から上下均一に吹き出される。
【００２１】
つづいて、本発明の第５実施形態の説明をする。
図１２は第５実施形態としての煙吹出装置の鳥瞰図、図１３は同煙吹出装置の一部破断側面図であり、図１２中のＡ−Ａ断面図は第１実施形態の図３と同一である。また図１４は、図１２の煙吹出支柱２を後流側（図１２の右側）より見た部分図である。
この実施形態は第１実施形態の煙の導入口１の代わりに、翼型断面を持つ煙吹出支柱２の側面に煙導入口を移し、そこに接続するホースの接続点１９の上部に境界層分離板２１を備えている点で第１実施形態と異なっている。なお第１実施形態と同じ符号の部材は同一部材を指している。
煙吹出支柱２は図１３に示すように煙吹出支柱２内の流路１１に連通する煙吹出口としてのスリット３を備えており、また煙供給管４に連通する２本のダクト５、６を備えている。２本のダクト５、６はアルミハニカム、整流網、多孔体等からなる流れの抵抗体７を介して煙供給管４と連通している。２本のダクト５、６は図中上方において通路８により連通しており、また２本のダクトの内１本のダクト６には、略全長に渡って煙吹出用開口９が形成され、この開口にもアルミハニカム、整流網、多孔体等からなる流れの抵抗体１０が取り付けられている。また図１２に示すように煙吹出支柱２の側面に煙供給ホース１８を接続し、ホース１８と煙供給管４は連通している。またホース１８の接続点１９の上部にはホース１８を接続する側の煙吹出支柱２の側面の端から端までの境界層分離板２１を備えている。
【００２２】
上記構成からなる煙吹出装置では、煙はホース１８から煙供給管４に入り、煙供給管４に入った煙は流れの抵抗体７を通って２本のダクト５、６に入る。この２本のダクト５、６に流れ込んだ煙は、煙吹出用開口９を有するダクト６の両端から煙吹出用開口９に向かって流れ出し、同開口９に設けた抵抗体１０を介して煙吹出支柱２内の流路１１に均一に流れ出す。流路１１に流れた煙は煙吹出支柱２の側面に形成した煙吹出口としてのスリット３から上下均一に吹き出される。このとき、境界層分離板２１は境界層分離板が無い場合にホース１８の接続点１９で上方に向かって発生する渦状乱流境界層がスリット３から吹き出る煙の流れを乱すのを防止している。
【００２３】
以上、本発明の実施の形態について説明してきたが、本発明では流路１１と抵抗体１０は煙の乱れを気にしない場合には省略も可能である。また、流れの抵抗体７、１０の抵抗係数（損失係数）の分布を最適制御することにより上下の煙の吹出量の均一化をさらに改善することが可能である。さらに流れの抵抗体７、１０の抵抗係数（損失係数）の分布を自動制御することにより上下の煙の吹出量の均一化と煙の量を制御できるなど種々の実施形態とすることも可能である。
さらに、本発明はその精神または主要な特徴から逸脱することなく、他のいかなる形でも実施できる。そのため、前述の実施形態はあらゆる点で単なる例示にすぎず限定的に解釈してはならない。
【００２４】
【発明の効果】
以上詳細に説明したように、本発明は、煙供給管に流れの抵抗体を介して連通する２本のダクトと、この２本のダクトの端部を連通する通路と、一方のダクトの略全長に渡って形成されかつ抵抗体を有する煙吹出用開口とを備えており、２本のダクトに流れ込んだ煙は、ダクトの両端から煙吹出用開口に向かって流れだし、同開口に設けた抵抗体を介して煙吹出支柱内の流路を経由してスリット等の煙吹出口から均一に流れだす。この結果、煙吹出支柱の上下の煙吹出量の均一化を図ることができる。なお、ダクトは必要に応じて一本とし、そのダクトの両端に煙供給用ホールを接続することも可能である。また、抵抗体の抵抗係数（損失係数）の分布を自動制御することにより上下の煙の吹出量の均一化をさらに改善できる。また抵抗体の抵抗係数（損失係数）の分布を自動制御することにより上下の煙の吹出量の均一化と煙の量を制御できる、等の優れた効果を奏することができる。
【図面の簡単な説明】
【図１】煙吹出装置の第１実施形態としての側面図である。
【図２】同煙吹出装置の一部破断側断面図である。
【図３】図１中のＡ−Ａ断面図である。
【図４】煙吹出装置の第２実施形態としての側面図である。
【図５】同煙吹出装置の拡大破断側面図である。
【図６】図４中のＢ−Ｂ断面図である。
【図７】第３実施形態としての煙吹出装置の鳥瞰図である。
【図８】同煙吹出装置の一部破断側面図である。
【図９】第４実施形態としての煙吹出装置の側面図である。
【図１０】同煙吹出装置の一部破断側面図である。
【図１１】図９中のＣ−Ｃ断面図である。
【図１２】第５実施形態としての煙吹出装置の鳥瞰図であり、煙供給ホース接続部から発生する渦状乱流境界線を示す図である。
【図１３】同煙吹出装置の一部破断側面図である。
【図１４】図１２の煙吹出支柱２を後側（図１２の向かって右手）より見た部分図である。
【符号の説明】
１導入口
２煙吹出支柱
３煙吹出口（スリット）
４煙供給管
５、６ダクト
７、１０、１７抵抗体
８通路
９煙吹出用開口
１１流路
１２後縁のスリット
１３ホース
１４ホース１３の接続点
１５ホース
１６ホース１５の接続点
１８ホース
１９ホース１８の接続点
２０煙吹出装置
２１境界層分離板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a smoke blowing device used for visualizing a fluid caused by smoke in a wind tunnel, and more particularly to a smoke blowing device capable of blowing smoke uniformly in the wind tunnel.
[0002]
[Prior art]
Conventionally, a smoke blowing device used for visualization of a fluid by smoke in a wind tunnel supplies smoke from one end of a support column, and smoke flows from a smoke discharge outlet formed by a slit formed in the vertical direction of the support column into the wind tunnel. It is the composition which blows out.
[0003]
[Problems to be solved by the invention]
However, the conventional smoke blowing device has only one duct formed in the support column, and is configured to supply smoke from one end side of the duct. Therefore, the smoke blowing outlet is closer to the smoke supply port. The amount of smoke blown out from the air increased, and it was not possible to blow out smoke uniformly over the top and bottom of the column. Therefore, the amount of smoke blown in the vertical direction in the wind tunnel is different, which is insufficient in terms of fluid visualization. Also, if the smoke supply hose is connected to the side of the smoke outlet column in the wind tunnel, a spiral turbulent boundary line is generated on the side surface of the smoke outlet column from the connection point, disturbing the flow of the smoke, and the point of fluid visualization It was insufficient.
[0004]
Therefore, the present invention provides a flow resistor between the smoke supply pipe and the duct so that the smoke can be blown out uniformly from the smoke blowing opening formed in the entire length of the duct toward the smoke blowing outlet. It is an object of the present invention to solve the above-mentioned problems by providing a smoke blowing device that can provide smoke from both ends of a duct having a perforated plate, a net, and the like and having a smoke blowing opening. Further, in order to prevent the spiral turbulent boundary line generated from the smoke supply hose connection point on the side surface of the smoke blowing column, by providing a smoke blowing device provided with a boundary layer separation plate at the upper part of the hose connection point, The object is to solve the above problems.
[0005]
The present invention relates to two ducts that communicate with a smoke supply pipe via a flow resistor, a passage that communicates the ends of the two ducts, and smoke formed over substantially the entire length of one duct. With a blow-off opening, and the smoke enters the two ducts through the flow resistor from the smoke supply pipe. The smoke flowing into the two ducts flows from both ends of the duct having the smoke blowing opening toward the smoke blowing opening, and is uniformly blown out from the smoke blowing outlet of the smoke blowing column communicating with the opening. In addition, the flow resistor can be provided in the smoke blowing opening formed in the duct as necessary.
[0006]
The flow resistor has a function of reducing the turbulence of the air flow, and can be composed of a rectifying element such as an aluminum honeycomb, a rectifying network, or a porous body. Furthermore, the form of the smoke blowout outlet formed in the smoke blowout column is a thin pipe, a small-diameter hole, blown from the slit using the Coanda effect, or sheet-like smoke from the slit at the rear edge of the smoke blowout column. There is a structure that blows out.
[0007]
[Problems to be solved by the invention]
For this reason, the technical solution means adopted by the present invention is:
1. A smoke supply pipe 4, two ducts 5 and 6 communicating with the smoke supply pipe, and a smoke blow column 2 having a smoke blow-out port 3 , one end side of the two ducts being The smoke supply pipe 4 communicates with the flow resistor 7, and the other ends of the two ducts communicate with each other. Further, one of the two ducts 6 is connected to one duct 6. Is provided with a smoke blowing opening 9 having a flow resistor, and the smoke blowing opening 9 of the duct is communicated with the smoke blowing outlet 3 provided in the smoke blowing column 2. is there.
The smoke blowing opening having a flow resistor provided in the duct is provided over substantially the entire length of the duct .
Further, the two ducts are smoke blowing devices formed in a smoke blowing column.
Further, the smoke blowing column is a smoke blowing device characterized in that smoke can be blown out by a Coanda effect from a slit formed on a side surface of the smoke blowing column.
Further, the smoke blowing column is a smoke blowing device characterized in that smoke can be blown out from a smoke blowing outlet arranged at a predetermined interval in the vertical direction.
The flow resistor may be any one of a flow regulating element such as a perforated plate, a net, and a honeycomb, or a combination thereof.
In addition, the smoke blowing column can emit sheet-like smoke from a slit-like smoke outlet 12 formed at a rear edge portion of the smoke blowing column having an airfoil cross-sectional shape. It is a blowing device.
Further, instead of the duct 5 without the smoke blowing opening 9 out of the two ducts, smoke supply hoses 13 and 15 are directly connected to both ends of the duct 6 having the smoke blowing opening 9. It comprises a resistor 17 the upper part of the flow of 6, and characterized by being so out blow the smoke from the smoke outlet opening 9 through the resistor 7 and 17 of the flow of smoke which is supplied from the smoke supply hose Smoke blowing device.
Further, in the wind tunnel, when connecting a hose for supplying smoke to the smoke supply pipe 4 from the side surface of the smoke blowing column having an airfoil cross-sectional shape, or to the side surface of the smoke blowing column having an airfoil cross-sectional shape When connecting the smoke supply hoses 13 and 15, the smoke blowout device is characterized in that a boundary layer separation plate is provided above the connection point of the hose to prevent the generation of a spiral turbulent boundary line.
[0008]
Embodiment
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a smoke blowing device according to the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a smoke blowing device as a first embodiment, FIG. 2 is a partially broken sectional view of the smoke blowing device, and FIG. 3 is a sectional view taken along line AA in FIG.
[0009]
In FIG. 1, a smoke blowing device 20 includes an inlet 1 for introducing smoke and a smoke outlet 3 for blowing smoke, and the smoke blowing column 2 is a smoke outlet in the vertical direction as shown in the figure. A slit 3 is formed. The smoke supplied from the inlet 1 is blown out uniformly from the entire length of the slit 3 through the flow path 11 in the smoke blowing column 2 described later using the Coanda effect.
[0010]
In FIG. 2, the smoke blowing device 20 includes a smoke supply pipe 4 having a smoke inlet 1, and two ducts 5, 6 are attached to the smoke supply pipe 4. Is communicated with the smoke supply pipe 4 via a flow resistor 7 made of an aluminum honeycomb, a rectifying network, a porous body or the like. The two ducts 5 and 6 communicate with each other by a passage 8 in the upper part of the figure, and one duct 6 of the two ducts 5 and 6 is formed with a smoke blowing opening 9 over substantially the entire length. A flow resistor 10 made of an aluminum honeycomb, a rectifying network, a porous body, or the like is attached to the opening 9 as necessary.
[0011]
The two ducts 5 and 6 are formed in a smoke blowing column 2 having a cross section having a slit 3 as a smoke blowing outlet on a side surface and having a wing shape (see FIG. 3). The slit 3 is formed to have a predetermined length in the vertical direction of the support column 2, and the slit 3 communicates with a smoke blowing opening 9 formed in the duct 6 through a flow path 11 formed in the smoke blowing column 2. is doing.
[0012]
In the smoke blowing device 20 having the above structure, the smoke enters the two ducts 5 and 6 through the flow resistor 7 from the smoke supply pipe 4. The smoke flowing into the two ducts 5 and 6 flows out from both ends of the duct 6 having the smoke blowing opening 9 toward the smoke blowing opening 9, and is smoked through the resistor 10 provided in the opening 9. It flows uniformly into the flow path 11 in the blowing column 2. The smoke that has flowed into the flow path 11 is uniformly blown from the entire length of the slit 3 by the Coanda effect from the slit 3 formed in the smoke blowing column 2.
[0013]
In this smoke flow, the smoke passes from the smoke supply pipe 4 through the flow resistor 7 (perforated plate, net, etc.) and enters the two ducts 5, 6. As a result, the internal pressure decreases toward the top. On the other hand, since no smoke is blown out in the duct 5, the internal pressure at the upper part is higher than that at the upper part of the duct 6, so that the smoke flows into the duct 6 from the duct 5 to reduce the pressure difference between the upper and lower sides of the duct 6. For this reason, the uniformity of the amount of the upper and lower smoke blown out from the duct 6 to the flow path 11 is improved.
Here, the flow resistors 7 and 10 promote the equalization of the pressure by reducing the flow velocity in the ducts 5 and 6, and also act to diffuse the flow evenly.
Further, the flow path 11 is a portion that reduces the turbulence of the air current, and a rectifying element such as an aluminum honeycomb or a rectifying network is mounted therein.
[0014]
Next, the second embodiment of the present invention will be described.
FIG. 4 is a side view of a smoke blowing device as a second embodiment, FIG. 5 is an enlarged sectional view of the smoke blowing device, and FIG. 6 is a cross-sectional view taken along line BB in FIG.
[0015]
This embodiment is different from the first embodiment in that instead of the slit 3 of the first embodiment described above, a smoke blowing column 2 having a large number of smoke blowing outlets 3A in the vertical direction is used. In addition, the member of the same code | symbol as 1st Embodiment has pointed out the same member.
As shown in FIG. 5, the smoke blowing column 2 has a large number of smoke blowing outlets 3 </ b> A communicating with the flow passage 11 in the smoke blowing column 2, and two ducts 5, 6 communicating with the smoke supply pipe 4 are provided. I have. The two ducts 5 and 6 communicate with the smoke supply pipe 4 via a flow resistor 7 made of an aluminum honeycomb, a rectifying network, a porous body, or the like. The two ducts 5 and 6 communicate with each other by a passage 8 in the upper part of the figure, and one duct 6 of the two ducts 5 and 6 is formed with a smoke blowing opening 9 over substantially the entire length. A flow resistor 10 made of an aluminum honeycomb, a rectifying network, a porous body or the like is also attached to this opening.
[0016]
In the smoke blowing device 20 having the above structure, the smoke enters the two ducts 5 and 6 through the flow resistor 7 from the smoke supply pipe 4. The smoke flowing into the two ducts 5 and 6 flows out from both ends of the duct 6 having the smoke blowing opening 9 toward the smoke blowing opening 9, and is smoked through the resistor 10 provided in the opening 9. It flows uniformly into the flow path 11 in the blowing column 2. Smoke that has flowed into the flow path 11 is uniformly blown out from a large number of smoke outlets 3 </ b> A formed in the smoke blowing column 2.
[0017]
Subsequently, a third embodiment of the present invention will be described.
FIG. 7 is a bird's-eye view of a smoke blowing device as a third embodiment, and FIG. 8 is a partially broken side view of the smoke blowing device.
In this embodiment, instead of the slit 3 of the first embodiment described above, a smoke blowing column 2 having a smoke blowing slit 12 at the rear edge in the vertical direction is used, and a duct 1 is used instead of two ducts. It differs from the first embodiment in that it is a book and a hose is used instead of the second duct. In addition, the member of the same code | symbol as 1st Embodiment has pointed out the same member.
As shown in FIGS. 7 and 8, the smoke blowing column 2 has a slit 12 as a smoke blowing outlet communicating with the flow path 11 in the smoke blowing column 2 and communicates with the smoke supply hoses 13 and 14. A duct 6 is provided. The upper end of the duct 6 in the drawing is a hose 15 for supplying smoke via a flow resistor 17 composed of an aluminum honeycomb, a rectifying network, a porous body, and the like, and the lower end of the duct 6 is an aluminum honeycomb, a rectifying network, a porous body. It communicates with a hose 13 for supplying smoke via a flow resistor 7 composed of the like. The duct 6 is formed with a smoke blowing opening 9 over substantially the entire length, and a flow resistor 10 made of an aluminum honeycomb, a rectifying network, a porous body or the like is attached to this opening.
[0018]
In the smoke blowing device having the above structure, the smoke enters the duct 6 from the smoke supply hoses 13 and 14 through the flow resistors 7 and 17. The smoke flowing into the duct 6 flows out uniformly to the flow path 11 in the smoke blowing column 2 through the resistor 10 provided in the smoke blowing opening 9. The smoke that has flowed into the flow path 11 is uniformly blown up and down through a slit 12 that is formed at the rear edge of the smoke blowing column 2 and serves as a smoke blowing outlet.
[0019]
Subsequently, a fourth embodiment of the present invention will be described.
9 is a side view of a smoke blowing device as a fourth embodiment, FIG. 10 is a partially cutaway side view of the smoke blowing device, and FIG. 11 is a cross-sectional view taken along the line CC in FIG.
This embodiment differs from the first embodiment in that one duct is used instead of the two ducts of the first embodiment, and a hose is used instead of the second duct. In addition, the member of the same code | symbol as 1st Embodiment has pointed out the same member.
As shown in FIG. 10, the smoke blowing column 2 is provided with a slit 3 as a smoke blowing port communicating with the flow path 11 in the smoke blowing column 2, and two smoke supply pipes communicating with both ends of the duct 6. Hoses 13 and 15 are provided. One duct 6 communicates with smoke supply hoses 13 and 15 through flow resistors 7 and 17 made of an aluminum honeycomb, a rectifying network, a porous body, and the like at both ends. The duct 6 is formed with a smoke blowing opening 9 over substantially the entire length, and a flow resistor 10 made of an aluminum honeycomb, a rectifying network, a porous body or the like is attached to the opening.
[0020]
In the smoke blowing device having the above structure, the smoke enters the duct 6 from both ends of one duct 6 through the flow resistors 7 and 17 from the two hoses 13 and 15 for supplying smoke. The smoke that has flowed into the single duct 6 flows out from both ends of the duct 6 toward the smoke blowing opening 9 and is uniformly distributed to the flow path 11 in the smoke blowing column 2 through the resistor 10 provided in the opening 9. Flows out. The smoke that has flowed into the flow path 11 is uniformly blown up and down from a slit 3 as a smoke outlet formed on the side surface of the smoke blowing column 2.
[0021]
Subsequently, a fifth embodiment of the present invention will be described.
FIG. 12 is a bird's-eye view of the smoke blowing device as the fifth embodiment, FIG. 13 is a partially broken side view of the smoke blowing device, and the AA sectional view in FIG. 12 is the same as FIG. 3 of the first embodiment. It is. FIG. 14 is a partial view of the smoke blowing column 2 of FIG. 12 as viewed from the downstream side (right side of FIG. 12).
In this embodiment, instead of the smoke inlet 1 of the first embodiment, the smoke inlet is moved to the side of the smoke blowing column 2 having an airfoil cross section, and the boundary layer is formed above the connection point 19 of the hose connected thereto. This is different from the first embodiment in that a separation plate 21 is provided. In addition, the member of the same code | symbol as 1st Embodiment has pointed out the same member.
As shown in FIG. 13, the smoke blowing column 2 includes a slit 3 as a smoke blowing port communicating with the flow path 11 in the smoke blowing column 2, and two ducts 5, 6 communicating with the smoke supply pipe 4. It has. The two ducts 5 and 6 communicate with the smoke supply pipe 4 via a flow resistor 7 made of an aluminum honeycomb, a rectifying network, a porous body or the like. The two ducts 5 and 6 are communicated with each other by a passage 8 in the upper part of the figure, and one of the two ducts 6 is provided with a smoke blowing opening 9 over substantially the entire length. A flow resistor 10 made of an aluminum honeycomb, a rectifying network, a porous body or the like is also attached to the opening. Further, as shown in FIG. 12, a smoke supply hose 18 is connected to the side surface of the smoke blowing column 2, and the hose 18 and the smoke supply pipe 4 are communicated with each other. Further, a boundary layer separation plate 21 is provided at the upper part of the connection point 19 of the hose 18 from the end of the side surface of the smoke blowing column 2 on the side where the hose 18 is connected.
[0022]
In the smoke blowing device having the above configuration, the smoke enters the smoke supply pipe 4 from the hose 18, and the smoke that has entered the smoke supply pipe 4 enters the two ducts 5 and 6 through the flow resistor 7. The smoke flowing into the two ducts 5 and 6 flows out from both ends of the duct 6 having the smoke blowing opening 9 toward the smoke blowing opening 9 and is blown out via the resistor 10 provided in the opening 9. It flows out uniformly to the flow path 11 in the column 2. The smoke that has flowed into the flow path 11 is uniformly blown up and down from a slit 3 as a smoke outlet formed on the side surface of the smoke blowing column 2. At this time, the boundary layer separation plate 21 prevents the spiral turbulent boundary layer generated upward at the connection point 19 of the hose 18 from disturbing the flow of smoke blown out from the slit 3 when there is no boundary layer separation plate. Yes.
[0023]
As described above, the embodiment of the present invention has been described. However, in the present invention, the flow path 11 and the resistor 10 can be omitted when the disturbance of smoke is not a concern. In addition, it is possible to further improve the uniformity of the upper and lower smoke discharge amounts by optimally controlling the distribution of the resistance coefficient (loss coefficient) of the flow resistors 7 and 10. Furthermore, it is possible to make various embodiments such that the distribution of the resistance coefficient (loss coefficient) of the flow resistors 7 and 10 can be automatically controlled so that the amount of smoke blown up and down can be made uniform and the amount of smoke can be controlled. is there.
In addition, the present invention can be implemented in any other form without departing from the spirit or main features thereof. Therefore, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner.
[0024]
【The invention's effect】
As described above in detail, the present invention includes two ducts that communicate with the smoke supply pipe via a flow resistor, a passage that communicates the ends of the two ducts, and one duct. A smoke blowout opening formed over the entire length and having a resistor, and the smoke flowing into the two ducts flows from both ends of the duct toward the smoke blowout opening and is provided in the opening. It flows uniformly from the smoke outlet, such as a slit, through the flow path in the smoke outlet column through the resistor. As a result, it is possible to make uniform the amount of smoke blown above and below the smoke blowout column. It is also possible to use a single duct as necessary, and to connect smoke supply holes to both ends of the duct. In addition, by automatically controlling the distribution of the resistance coefficient (loss coefficient) of the resistor, it is possible to further improve the uniformity of the upper and lower smoke blowing amounts. In addition, by automatically controlling the distribution of the resistance coefficient (loss coefficient) of the resistor, it is possible to achieve excellent effects such as equalizing the amount of smoke blown up and down and controlling the amount of smoke.
[Brief description of the drawings]
FIG. 1 is a side view of a smoke blowing device as a first embodiment.
FIG. 2 is a partially broken side sectional view of the smoke blowing device.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is a side view of the smoke blowing device as a second embodiment.
FIG. 5 is an enlarged cutaway side view of the smoke blowing device.
6 is a cross-sectional view taken along the line BB in FIG.
FIG. 7 is a bird's-eye view of a smoke blowing device as a third embodiment.
FIG. 8 is a partially cutaway side view of the smoke blowing device.
FIG. 9 is a side view of a smoke blowing device as a fourth embodiment.
FIG. 10 is a partially broken side view of the smoke blowing device.
FIG. 11 is a cross-sectional view taken along the line CC in FIG.
FIG. 12 is a bird's-eye view of a smoke blowing device as a fifth embodiment, showing a spiral turbulent boundary line generated from a smoke supply hose connection portion.
FIG. 13 is a partially cutaway side view of the smoke blowing device.
14 is a partial view of the smoke blowing column 2 of FIG. 12 as viewed from the rear side (right hand as viewed in FIG. 12).
[Explanation of symbols]
1 Inlet 2 Smoke outlet 3 Smoke outlet (slit)
4 Smoke supply pipe 5, 6 Duct 7, 10, 17 Resistor 8 Passage 9 Smoke blowout opening 11 Channel 12 Rear edge slit 13 Hose 14 Hose 13 connection point 15 Hose 16 Hose 15 connection point 18 Hose 19 Hose 18 connection points 20 Smoke blowing device 21 Boundary layer separation plate

Claims

A smoke supply pipe 4, two ducts 5, 6 communicating with the smoke supply pipe, and a smoke blowing column 2 having a smoke outlet 3 , one end of the two ducts being a flow resistor 7 The other end side of the two ducts communicates with each other through the smoke supply pipe 4, and one of the two ducts 6 has a flow resistor. A smoke blowout device comprising a smoke blowout opening 9 having a duct, and the smoke blowout opening 9 of the duct communicating with the smoke blowout outlet 3 provided in the smoke blowout column 2.

The smoke blowing device according to claim 1, wherein the smoke blowing opening having a flow resistor provided in the duct is provided over substantially the entire length of the duct.

The smoke blowing device according to claim 1 or 2, wherein the two ducts are formed in a smoke blowing column.

The smoke blowing column according to claim 1 or 2, wherein the smoke blowing column can blow out smoke by a Coanda effect from a slit formed on a side surface of the smoke blowing column.

The smoke blowing device according to claim 1 or 2, wherein the smoke blowing column can blow smoke from a smoke blowing outlet arranged at a predetermined interval in the vertical direction.

The smoke blowout according to any one of claims 1 to 5, wherein the flow resistor is composed of any one of rectifying elements such as a perforated plate, a net, and a honeycomb, or a combination thereof. apparatus.

2. The smoke blowing column can blow out sheet-like smoke from a slit-like smoke outlet 12 formed at a rear edge portion of a smoke blowing column having an airfoil cross-sectional shape. The smoke blowing device according to claim 6.

Of the two ducts, instead of the duct 5 without the smoke blowing opening 9, smoke supply hoses 13 and 15 are directly connected to both ends of the duct 6 having the smoke blowing opening 9. the upper part comprises the flow of the resistor 17, characterized in that as out blow the smoke from the smoke outlet opening 9 through the resistor 7 and 17 of the flow of smoke which is supplied from the smoke supply hose according The smoke blowing apparatus in any one of Claims 1-7.

In the wind tunnel, when connecting a hose for supplying smoke to the smoke supply pipe 4 from the side surface of the smoke blowing column having the airfoil cross-sectional shape, or supplying the smoke to the side surface of the smoke blowing column having the airfoil cross-sectional shape 9. When connecting hoses 13 and 15, a boundary layer separation plate is provided above the connection point of the hose to prevent the occurrence of a spiral turbulent boundary line. The smoke blowing device described.