| タイトル | Three-dimensional nearfield characterization of a VSTOL jet in turbulent crossflow |
| 著者（英） | Orzechowski, J. A.; Snyder, P. K.; Baker, A. J. |
| 著者所属（英） | Computational Mechanics Co.; NASA Ames Research Center; Tennessee Univ. |
| 発行日 | 1987-01-01 |
| 言語 | eng |
| 内容記述 | This paper documents the measurement and prediction of the near-field evolution of the steady, subsonic, turbulent three-dimensional external aerodynamic flow-field associated with a high speed jet issued from an orifice perpendicular to an imposed crossflow velocity field. A parabolic Navier-Stokes CFD solver is employed, utilizing a Kappa-epsilon closure system with algebraic Reynolds stress equation, in concert with suitably defined porous far-field boundary conditions and a virtual source initial condition procedure. The CFD results correlate well with NASA generated near-field LDA experimental data on mean velocity and rms fluctuation velocity (interpolated to turbulent kinetic energy) distributions. The numerical results in the farther field predict the vortex roll-up and jet deflection/entrainment characterization verified by pitot-static mean velocity experimental data. Detailed results are presented for a circular jet for velocity ratios ranging 4 to 8. |
| NASA分類 | AERODYNAMICS |
| レポートNO | 87A22382
AIAA PAPER 87-0051 |
| 権利 | Copyright |
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