A Study of Expansion Tube Gas Flow Conditions for Scramjet Combustor Model Testing

ow process inside an expansion tube facility. The work is a combined numerical/experimental eort. Axisymmetric, viscous, unsteady RANS simulations of the operation of an expansion tube have been performed. Additionally, measurements of observable quantities have been carried out to validate the simulations and to gain detailed physical insight into the operation of the facility. Here, a comparison of transient wall static pressure, shock Mach numbers and stagnation point pressures at the tube outlet have been selected for comparison. The transient test gas ow is then analyzed on grounds of the results of the numerical simulation.

[1]  Allan Paull,et al.  Test flow disturbances in an expansion tube , 1992, Journal of Fluid Mechanics.

[2]  S. Dennis,et al.  The boundary layer in a shock tube , 1972, Journal of Fluid Mechanics.

[3]  Richard G. Morgan,et al.  The measurement of Pitot pressure in high enthalpy expansion tubes , 2001 .

[4]  E. Toro,et al.  Restoration of the contact surface in the HLL-Riemann solver , 1994 .

[5]  David C. Wilcox,et al.  Formulation of the k-omega Turbulence Model Revisited , 2007 .

[6]  H. Mirels.  Correlation Formulas for Laminar Shock Tube Boundary Layer , 1966 .

[7]  B. V. Leer,et al.  Towards the ultimate conservative difference scheme V. A second-order sequel to Godunov's method , 1979 .

[8]  G. Iaccarino,et al.  Full system scramjet simulation , 2009 .

[9]  H. Mirels.  Shock Tube Test Time Limitation Due to Turbulent-Wall Boundary Layer , 1964 .

[10]  E. M. Rothkopf,et al.  Diaphragm opening process in shock tubes , 1974 .

[11]  Harold Mirels,et al.  Flow Nonuniformity in Shock Tubes Operating at Maximum Test Times , 1966 .

[12]  Akihiro Sasoh,et al.  Expansion Tube Operation with Thin Secondary Diaphragm , 2006 .

[13]  Heinz Pitsch,et al.  Full-system RANS of the HyShot II scramjet Part 2: Reactive cases , 2010 .

[14]  Ronald K. Hanson,et al.  Thermometry and Velocimetry in Supersonic Flows via Scanned Wavelength-Modulation Absorption Spectroscopy , 2011 .

[15]  D. Wilcox.  Formulation of the k-w Turbulence Model Revisited , 2008 .

[16]  Ronald K. Hanson,et al.  Design and Characterization of the Stanford 6 Inch Expansion Tube , 2006 .

[17]  P. Spalart.  A One-Equation Turbulence Model for Aerodynamic Flows , 1992 .

[18]  D. White,et al.  Influence of diaphragm opening time on shock-tube flows , 1958, Journal of Fluid Mechanics.

[19]  A. Burcat,et al.  Third millenium ideal gas and condensed phase thermochemical database for combustion (with update from active thermochemical tables). , 2005 .

[20]  Robert L. Trimpi,et al.  A Preliminary Theoretical Study of the Expansion Tube, a New Device for Producing High-Enthalpy Short-Duration Hypersonic Gas Flows , 1962 .

[21]  S. Imlay,et al.  Blunt-body flow simulations , 1988 .

[22]  F. Menter.  Two-equation eddy-viscosity turbulence models for engineering applications , 1994 .

[23]  A. Jameson.  Time dependent calculations using multigrid, with applications to unsteady flows past airfoils and wings , 1991 .

[24]  G. Sod.  A survey of several finite difference methods for systems of nonlinear hyperbolic conservation laws , 1978 .