NASA NACA-TN-2001-1956 Aerodynamic characteristics of damping screens《阻尼屏幕的空气动力特性》.pdf

《NASA NACA-TN-2001-1956 Aerodynamic characteristics of damping screens《阻尼屏幕的空气动力特性》.pdf》由会员分享，可在线阅读，更多相关《NASA NACA-TN-2001-1956 Aerodynamic characteristics of damping screens《阻尼屏幕的空气动力特性》.pdf（43页珍藏版）》请在麦多课文档分享上搜索。

1、i ,_o_“ “ _“ , “i_“_-_“-iI m al(C) Test apparatusA. p,staticpressure Ibeforescreen; P2 staticpressure after C B A c_screen;_2, mean velocityafterscreen. _(d) Test apparatus B.roOoFigure 2.- Apparatus usedindeterminingcoefficientsofscreens and damping ofspatialvariationsinspeed.Provided by IHSNot for

2、 ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA TN 2001 252O lll14 _(fps) , I /.01o - of-Jp _._- - - %Vind speed-.oos “- _-_/i ,-,m,_-.-.-.-4(_ps):,7Wind.004Screen F, 54 mesh I_d=0.0055in.-!_ f-/ cx = 3.5.002 _ . 6No “ _ r K = 2.1, : “ “ ._ , _- 2020 NO grid _-I - ;

3、12 = 2.70 I-_ _ _ i00 1I0 120 130 140 150 160 170 180Distance downstream from grid, in.Figure 7.- Longitudinal component ofturbulence showing abnormal performance. Curves without points h9for screen absent. _oProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-