Experimental study of stability of strongly underexpanded laminar free and impact jets

被引：0
作者：
A. A. Maslov
S. G. Mironov
机构：
[1] Russian Academy of Sciences,Institute of Theoretical and Applied Mechanics, Siberian Division
来源：
Journal of Applied Mechanics and Technical Physics | 2001年 / 42卷 / 6期
关键词：
Growth Rate; Mathematical Modeling; Experimental Study; Reynolds Number; Mechanical Engineer;
D O I：
10.1023/A:1012501524786
中图分类号：
学科分类号：
摘要：
The growth rates of density fluctuations in the mixing layer of strongly underexpanded low‐density jets are measured by the electron‐beam technique within the range of Reynolds numbers ReL = 50 – 230. Regimes of self‐induced oscillations are determined for these flow conditions in the case of a jet incident normally onto a finite‐size target. Results on the frequency of pressure oscillations on the target are obtained and compared with the spectra of the growth rates of density fluctuations in the mixing layer of free jets. It is shown that self‐induced oscillations cannot be sustained because of the development of instability in the mixing layer of the jet.
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页码：959 / 965
页数：6
相关论文
共 21 条
  • [1] Hartmann J.(1927)A new acoustic generator. The air-jet generator J. Sci. Instrum. 4 18-26
  • [2] Trolle B.(1988)The sound-producing oscillations of round underexpanded jets impinging on normal plates J. Acoust. Soc. Amer. 83 515-533
  • [3] Powell A.(1991)Feedback mechanism in self-induced oscillations upon incidence of a supersonic underexpanded jet onto a at target Prikl. Mekh. Tekh. Fiz. 32 59-63
  • [4] Glaznev V. N.(1991)Self-oscillatory regime of interaction of an underexpanded jet and a target in the presence of a supersonic cocurrent flow Prikl. Mekh. Tekh. Fiz. 32 50-58
  • [5] Gorshkov G. F.(1993)Effect of the parameters of the external feedback circuit on the characteristics of self-induced oscillations upon incidence of an underexpanded jet onto a finite target Prikl. Mekh. Tekh. Fiz. 34 94-100
  • [6] Uskov V. N.(1987)Numerical solution of the problem of unstationary interaction of a supersonic jet and a target Model. Mekh. 1 151-158
  • [7] Ushakov A. P.(1991)Inuence of rarefaction on the unsteady impingement process of an underexpanded supersonic jet onto a perpendicular target Prikl. Mekh Tekh. Fiz. 32 78-83
  • [8] Mironov S. G.(1999)Self-excited oscillations in supersonic rarefied impact jets Prikl. Mekh. Tekh. Fiz. 40 109-115
  • [9] Uskov V. N.(2000)An experimental study of density waves in a hypersonic shock layer on a at plate Phys. Fluids 12 1544-1553
  • [10] Tsymbalov V. V.(2000)Experimental study of density uctuations in a hypersonic laminar wake behind a cone Prikl. Mekh. Tekh. Fiz. 41 111-117
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