Firebolt v2.0 - Structured Grid Navier-Stokes Code for Airframe/Propulsion Integration

A new turbomachinery simulation capability is currently being developed under the HPCMP CREATE-AV program. The end goal of this effort is to provide full-annulus turbomachinery simulations including the aircraft inlet system and blade structural deformation using highly parallel analysis software. This paper describes the status of the unstructured grid turbomachinery computational fluid dynamics (CFD) solver being developed as part of this capability. The new capability was shown to agree well with data for single-blade row and single-stage simulations. The paper also includes an example fullannulus rotor/inlet calculation. This new capability will serve to improve the fidelity of aircraft numerical simulations and can be used as a design tool or diagnostic technique to improve the quality and reduce the cost of future weapon systems. The CFD capability is available with the release of HPCMP CREATE-AV Kestrel v5.0.

[1]  D. Wilcox Reassessment of the scale-determining equation for advanced turbulence models , 1988 .

[2]  H. Lomax,et al.  Thin-layer approximation and algebraic model for separated turbulent flows , 1978 .

[3]  Scott A. Morton,et al.  Kestrel: A Fixed Wing Virtual Aircraft Product of the CREATE Program , 2009 .

[4]  L. Reid,et al.  Performance of single-stage axial-flow transonic compressor with rotor and stator aspect ratios of 1.63 and 1.78, respectively, and with design pressure ratio of 1.82 , 1978 .

[5]  Robert Nichols,et al.  A Comparison of Hybrid RANS/LES Turbulence Models for a Generic Weapons Bay With and Without a Spoiler , 2008 .

[6]  Roger L. Davis,et al.  Computational Approach for Predicting Stall Inception in Multistage Axial Compressors , 2007 .

[7]  Robert H. Nichols,et al.  Solver and Turbulence Model Upgrades to OVERFLOW 2 for Unsteady and High-Speed Applications , 2006 .

[8]  M. Strelets Detached eddy simulation of massively separated flows , 2001 .

[9]  Pieter G. Buning,et al.  Evaluation of Two High-Order Weighted Essentially Nonoscillatory Schemes , 2008 .

[10]  Robert H. Nichols,et al.  Algorithm and Turbulence Model Requirements for Simulating Vortical Flows , 2008 .

[11]  Jeffrey T. Onufer,et al.  A diagonalized diagonal dominant alternating direction implicit (D3ADI) scheme and subiteration correction , 1998 .

[12]  T. Barth,et al.  A one-equation turbulence transport model for high Reynolds number wall-bounded flows , 1990 .

[13]  Yildirim Suzen,et al.  Investigation of Supersonic Jet Exhaust Flow by One-and Two-Equation Turbulence Models , 1998 .

[14]  R. F. Warming,et al.  An implicit finite-difference algorithm for hyperbolic systems in conservation-law form. [application to Eulerian gasdynamic equations , 1976 .

[15]  Scott A. Morton,et al.  Aerodynamic Control Surface Implementation in Kestrel v2.0 , 2011 .

[16]  Christopher L. Rumsey,et al.  Assessment of two-equation turbulence models for transonic flows , 1994 .

[17]  Thomas H. Pulliam,et al.  Implementation of Preconditioned Dual-Time Procedures in OVERFLOW , 2003 .

[18]  Robert T. Biedron,et al.  Recent Enhancements To The FUN3D Flow Solver For Moving-Mesh Applications , 2009 .

[19]  David A. Boger,et al.  Prediction of Hydrodynamic Forces and Moments for Underwater Vehicles Using Overset Grids , 2006 .

[20]  P. Buning,et al.  Implementation of LU-SGS algorithm and Roe upwinding scheme in OVERFLOW thin-layer Navier-Stokes code , 1994 .

[21]  T. Pulliam,et al.  A diagonal form of an implicit approximate-factorization algorithm , 1981 .

[22]  Meng-Sing Liou,et al.  Contribution of the Recent AUSM Schemes to the Overflow Code: Implementation and Validation , 2000 .

[23]  Douglass E. Post,et al.  A new DoD initiative: the Computational Research and Engineering Acquisition Tools and Environments (CREATE) program , 2008 .

[24]  Arnold Afb,et al.  Firebolt v1.0 - Coupling of Transient and Steady Engine Performance Models with a High-Fidelity Navier-Stokes Code , 2011 .

[25]  Dimitri J. Mavriplis,et al.  A Multi-Code Python-Based Infrastructure for Overset CFD with Adaptive Cartesian Grids , 2008 .

[26]  Robert H. Nichols,et al.  Wall Function Boundary Conditions Including Heat Transfer and Compressibility , 2004 .

[27]  V. Venkatakrishnan,et al.  A UNIFIED MULTIGRID SOLVER FOR THE NAVIER-STOKES EQUATIONS ON MIXED ELEMENT MESHES , 1995 .

[28]  Scott A. Morton,et al.  Kestrel -- A Fixed Wing Virtual Aircraft Product of the CREATE Program , 2009, 2009 DoD High Performance Computing Modernization Program Users Group Conference.

[29]  Sean T. Barrows TURBO Turbulence Model Validation with Recommendations to Tip-Gap Modeling , 2008 .

[30]  Chunill Hah,et al.  Characterization of the first-stage rotor in a two-stage transonic compressor , 1995 .

[31]  P. Spalart,et al.  A New Version of Detached-eddy Simulation, Resistant to Ambiguous Grid Densities , 2006 .

[32]  Scott A. Morton,et al.  Kestrel v2.0 - 6DoF and Control Surface Additions to a CREATE Simulation Tool , 2010 .

[33]  Robert Meakin,et al.  Multiple-Body Proximate-Flight Simulation Methods , 2005 .

[34]  David L. Marcum,et al.  Efficient Generation of High-Quality Unstructured Surface and Volume Grids , 2001, Engineering with Computers.

[35]  Pieter G. Buning,et al.  User's Manual for FOMOCO Utilities-Force and Moment Computation Tools for Overset Grids , 1996 .

[36]  H. C. Yee Construction of explicit and implicit symmetric TVD schemes and their applications. [Total Variation Diminishing for fluid dynamics computation] , 1987 .

[37]  Robert H. Nichols,et al.  Addition of Improved Shock-Capturing Schemes to OVERFLOW 2.1 , 2009 .

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

[39]  Scott M. Murman,et al.  An Interface for Specifying Rigid-Body Motions for CFD Applications , 2003 .

[40]  C. Hirsch,et al.  Numerical Computation of Internal and External Flows. By C. HIRSCH. Wiley. Vol. 1, Fundamentals of Numerical Discretization. 1988. 515 pp. £60. Vol. 2, Computational Methods for Inviscid and Viscous Flows. 1990, 691 pp. £65. , 1991, Journal of Fluid Mechanics.

[41]  J. Benek,et al.  A 3-D Chimera Grid Embedding Technique , 1985 .

[42]  P. Spalart Comments on the feasibility of LES for wings, and on a hybrid RANS/LES approach , 1997 .

[43]  Bharat K. Soni,et al.  Application of Generalized Grids to CFD Simulation of Rotating Machineries , 2003 .

[44]  Robert H. Nichols,et al.  Evaluation of Hybrid RANS/LES Turbulence Models Using an LES Code , 2003 .

[45]  Steven J. Massey,et al.  Temperature Corrected Turbulence Model for High Temperature Jet Flow , 2003 .

[46]  L. Reid,et al.  Design and overall performance of four highly loaded, high speed inlet stages for an advanced high-pressure-ratio core compressor , 1978 .

[47]  Pieter G. Buning,et al.  A comparative study of turbulence models for overset grids , 1992 .

[48]  Carolyn Dear,et al.  A Computational Validation Study of Parallel TURBO for Rotor 35 , 2006 .

[49]  J. Steger,et al.  Flux vector splitting of the inviscid gasdynamic equations with application to finite-difference methods , 1981 .