Abstract
| Language | English |
|---|---|
| Pages | 688-696 |
| Number of pages | 8 |
| Journal | Journal of Propulsion and Power |
| Volume | 25 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - May 2009 |
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Keywords
- compressible jet plumes
- planar convergent–divergent nozzle
- separation shock
- experimental investigation
- numerical investigation
- exit-to-throat area ratios
- nozzle pressure ratios
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Experimental and numerical study of jet mixing from a shock-containing nozzle. / Xiao, Qing; Tsai, Her Mann; Papamoschou, Dimitri; Johnson, Andrew.
In: Journal of Propulsion and Power, Vol. 25, No. 3, 05.2009, p. 688-696.Research output: Contribution to journal › Article
TY - JOUR
T1 - Experimental and numerical study of jet mixing from a shock-containing nozzle
AU - Xiao, Qing
AU - Tsai, Her Mann
AU - Papamoschou, Dimitri
AU - Johnson, Andrew
PY - 2009/5
Y1 - 2009/5
N2 - The compressible jet plume emerging from a planar convergent-divergent nozzle containing a separation shock is investigated experimentally and numerically. The investigation encompasses exit-to-throat area ratios (Ae=At) from 1.0 to 1.8 and nozzle pressure ratios from 1.2 to 1.8. Experiments were conducted in a variable-geometry nozzle facility, and computations solved the Reynolds-averaged Navier-Stokes equations with several turbulence models. The computed mean velocity field outside the nozzle compares reasonably well with the experimental data. Among the different turbulence models tested, the two-equation shear stress transport model is found to provide the best agreement with the experiments. Jet mixing is governed by Ae=At and, to a lesser extent, by nozzle pressure ratios. Increasing Ae=At results in an increased growth rate and faster axial decay of the peak velocity. The experimental trends of jet mixing versus Ae=At and nozzle pressure ratios are captured well by the computations. Computations of turbulent kinetic energy show that, with increasing Ae=At , the peak turbulent kinetic energy in the plume rises and moves toward the nozzle exit. The significant increase of turbulent kinetic energy inside the nozzle is associated with asymmetric flow separation.
AB - The compressible jet plume emerging from a planar convergent-divergent nozzle containing a separation shock is investigated experimentally and numerically. The investigation encompasses exit-to-throat area ratios (Ae=At) from 1.0 to 1.8 and nozzle pressure ratios from 1.2 to 1.8. Experiments were conducted in a variable-geometry nozzle facility, and computations solved the Reynolds-averaged Navier-Stokes equations with several turbulence models. The computed mean velocity field outside the nozzle compares reasonably well with the experimental data. Among the different turbulence models tested, the two-equation shear stress transport model is found to provide the best agreement with the experiments. Jet mixing is governed by Ae=At and, to a lesser extent, by nozzle pressure ratios. Increasing Ae=At results in an increased growth rate and faster axial decay of the peak velocity. The experimental trends of jet mixing versus Ae=At and nozzle pressure ratios are captured well by the computations. Computations of turbulent kinetic energy show that, with increasing Ae=At , the peak turbulent kinetic energy in the plume rises and moves toward the nozzle exit. The significant increase of turbulent kinetic energy inside the nozzle is associated with asymmetric flow separation.
KW - compressible jet plumes
KW - planar convergent–divergent nozzle
KW - separation shock
KW - experimental investigation
KW - numerical investigation
KW - exit-to-throat area ratios
KW - nozzle pressure ratios
UR - http://www.aiaa.org/content.cfm?pageid=322&lupubid=24
UR - http://www.aiaa.org/
UR - http://dx.doi.org/10.2514/1.37022
U2 - 10.2514/1.37022
DO - 10.2514/1.37022
M3 - Article
VL - 25
SP - 688
EP - 696
JO - Journal of Propulsion and Power
T2 - Journal of Propulsion and Power
JF - Journal of Propulsion and Power
SN - 0748-4658
IS - 3
ER -