Experimental and numerical study of jet mixing from a shock-containing nozzle

Qing Xiao, Her Mann Tsai, Dimitri Papamoschou, Andrew Johnson

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

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.
LanguageEnglish
Pages688-696
Number of pages8
JournalJournal of Propulsion and Power
Volume25
Issue number3
DOIs
Publication statusPublished - May 2009

Fingerprint

nozzles
kinetic energy
Nozzles
shock
pressure ratio
plume
turbulence
turbulence models
Navier-Stokes equations
Kinetic energy
shear stress
plumes
experiment
Turbulence models
convergent-divergent nozzles
nozzle geometry
geometry
flow separation
throats
Navier-Stokes equation

Keywords

  • compressible jet plumes
  • planar convergent–divergent nozzle
  • separation shock
  • experimental investigation
  • numerical investigation
  • exit-to-throat area ratios
  • nozzle pressure ratios

Cite this

Xiao, Qing ; Tsai, Her Mann ; Papamoschou, Dimitri ; Johnson, Andrew. / Experimental and numerical study of jet mixing from a shock-containing nozzle. In: Journal of Propulsion and Power. 2009 ; Vol. 25, No. 3. pp. 688-696.
@article{fcbfa69c0cdb4e25ba9a89d7bc225d37,
title = "Experimental and numerical study of jet mixing from a shock-containing nozzle",
abstract = "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.",
keywords = "compressible jet plumes, planar convergent–divergent nozzle, separation shock, experimental investigation, numerical investigation, exit-to-throat area ratios, nozzle pressure ratios",
author = "Qing Xiao and Tsai, {Her Mann} and Dimitri Papamoschou and Andrew Johnson",
year = "2009",
month = "5",
doi = "10.2514/1.37022",
language = "English",
volume = "25",
pages = "688--696",
journal = "Journal of Propulsion and Power",
issn = "0748-4658",
number = "3",

}

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 journalArticle

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 -