基于柱状粗糙元的边界层人工转捩试验研究.pdf

20 3 Vol.20,No. 3 200609 Journal of Experiments in Fluid Mechanics Sep.,2006 : 16722 9897(2006) 032 00592 04 黄 勇,钱丰学, 于昆龙,何彬华, 畅利侠,林学东 ( , 621000) :, ,GBM2 04A, , , GBM2 04A , h = 0.09~ 0. 11mm, , , ;, :; ;;; :V211.7 : A Experimental investigation on boundary2layer artificial transition based on transition trip disk H ANG Yong,QIAN Feng2xue,Y Kun2long,HE Bin2hua,CHANG Li2xia,LINXue2dong (ChinaAerodynamics Research and Development Center, Mianyang Sichuan 621000, China) Abstract:In order to improve the accuracy, reliability and practicality of boundary2layer transition trip methods duringwind tunnel model test, and to supersede the traditional grit2type basedways, the specifica2 tions, manufacture technics and roughness element composition of trip disk are settled in this paper, mean2 while, the feasibility of the trip2disk based boundary layer transition trip methods are demonstrated by wind tunnel force test and surface sublimation techniques. The results indicate that, for the GBM204A calibration model, the optimal roughnessheight isbetween 0.09 and 0. 11mm and theroughness elements effectively pro2 duce prompt boundary layer transition at trip location without any additional drag occurring for roughness heightswithin this range. Trip disk is suitable for high speed wind tunnel testingwith many advantages over the traditional grit2trip. Key words:wind tunnel testing; high speedwind tunnel; boundary layer transition; trip disk; sublima2 tion technique 30 ,CARDC 0 120#