实验流体力学
實驗流體力學
실험류체역학
JOURNAL OF EXPERIMENTS IN FLUID MECHANICS
2005年
1期
11-16
,共6页
胡成行%蒋卫民%黄叙辉%周文军%徐来武
鬍成行%蔣衛民%黃敘輝%週文軍%徐來武
호성행%장위민%황서휘%주문군%서래무
激波/附面层干扰%压缩角%超声速流
激波/附麵層榦擾%壓縮角%超聲速流
격파/부면층간우%압축각%초성속류
shock wave/ boundary layer interaction%compression ramp%supersonic flow
介绍了10个压缩角模型在M数为2.011、2.504、3.015时产生的激波/边界层干扰的非定常特性的试验研究结果.压缩角模型的流向压缩角分别为15°、20°、24°,后掠角分别为0°、20°、40°、60°.实验结果表明:(a)所有无后掠压缩角和大多数20°后掠压缩角产生柱形干扰,而大后掠压缩角则产生锥形干扰;降低来流M数或增大模型后掠角有利于从柱形干扰转变为锥形干扰.(b)间隙区内的压力脉动出现低频峰值,此峰值随着模型后掠角增大或流向压缩角减小而减小;然而随着来流M数增大,此峰值在柱形干扰区减小,而在锥形干扰区略增大.对于锥形干扰,无粘激波的平均激波强度是控制其干扰特性的主要因素.
介紹瞭10箇壓縮角模型在M數為2.011、2.504、3.015時產生的激波/邊界層榦擾的非定常特性的試驗研究結果.壓縮角模型的流嚮壓縮角分彆為15°、20°、24°,後掠角分彆為0°、20°、40°、60°.實驗結果錶明:(a)所有無後掠壓縮角和大多數20°後掠壓縮角產生柱形榦擾,而大後掠壓縮角則產生錐形榦擾;降低來流M數或增大模型後掠角有利于從柱形榦擾轉變為錐形榦擾.(b)間隙區內的壓力脈動齣現低頻峰值,此峰值隨著模型後掠角增大或流嚮壓縮角減小而減小;然而隨著來流M數增大,此峰值在柱形榦擾區減小,而在錐形榦擾區略增大.對于錐形榦擾,無粘激波的平均激波彊度是控製其榦擾特性的主要因素.
개소료10개압축각모형재M수위2.011、2.504、3.015시산생적격파/변계층간우적비정상특성적시험연구결과.압축각모형적류향압축각분별위15°、20°、24°,후략각분별위0°、20°、40°、60°.실험결과표명:(a)소유무후략압축각화대다수20°후략압축각산생주형간우,이대후략압축각칙산생추형간우;강저래류M수혹증대모형후략각유리우종주형간우전변위추형간우.(b)간극구내적압력맥동출현저빈봉치,차봉치수착모형후략각증대혹류향압축각감소이감소;연이수착래류M수증대,차봉치재주형간우구감소,이재추형간우구략증대.대우추형간우,무점격파적평균격파강도시공제기간우특성적주요인소.
The paper presents the results of an experimental investigation on the unsteadiness of shock-wave/boundary layer interactions generated by ten ramps with streamwise angles of 15, 20 and 24 deg. and sweptback angles of 0, 20, 40 and 60 deg. respectively at Mach numbers of 2.011, 2.504 and 3.015. The results show that: (a) The interactions are cylindrical for all unswept and most of the 20 deg. sweptback interactions and quasi-conical for highly sweptback interactions. The decrease of Mach number or the increase of sweptback angle is favorable for the changeover from cylindrical to quasi-conical interaction. (b) The pressure fluctuations in the intermittent region show sharp low-frequency peak. The peak decreases with increasing sweptback or decreasing streamwise angle. However, with the increase of Mach number, the peaks decrease in cylindrical interactions but slightly increase in quasi-conical interactions. The average shock strength is a governing parameter in quasi-conical interaction.