Hypersonic Flows For Reentry Problems: Volume Ii: Test Cases — Experiments And Computations Proceedings Of A Workshop Held In Antibes, France, 22–25 January 1990 Proceedings Of A Workshop Held In Antibes, France, 22-25 January 1990

This entry describes the experimental work conducted in the Department of Aeronautics at Imperial College in connection with Test Problems 1 and 2 of the'Workshop on Hypersonic Flows for Reentry Problems, Part I'. These are defined as follows: Test Problem 1 Flow Over a Slender Cone Test Problem 2 Turbulent Base Flow The main requirement of this text is to present the experimental data for direct comparison with the predictions of CFD codes. We have therefore concentrated mainly on a factual statement of measuring techniques and results, together with an assessment of experimental accuracy. Future publications will be devoted to more extensive physical interpretations and discussions of the results. We have produced a large volume of data, some of which were categorised as'MANDATORY'and some as'OPTIONAL'for the purposes of CFD validation. However, only the'MANDATORY'data are presented here, although the other data are available and will be published separately later. 2. EXPERIMENTAL ARRANGEMENT 2. 1 The Test Facility The experiments were conducted in the Imperial College No. 2 Gun tunnel. This facility is a conventional intermittent blowdown tunnel with a contoured Mach 9 (nominal) axisymmetric nozzle fed by a free piston compression heater. The operating condition under which the data contained in this report were obtained is presented in Table 1. Test 2 T (oK) M b. Mlm Po (N/m) Re/m T (oK) IX) IX) Case IX) w 1. 1 7 7 +0. 14 9. 16 6. 67x10 5. 5xl0 59. Front Matter....Pages I-XIII Front Matter....Pages 1-5 Problem 1: Flow over a Slender Cone....Pages 6-7 Problem 2 : Turbulent Base Flow....Pages 8-9 Problem 3: Flow over a 2D Ramp....Pages 10-12 Problem 4 : Flow over a 3-D Obstacle....Pages 13-14 Problem 5: Corner Flow....Pages 15-16 Problem 6: Double (Simple) Ellipsoid....Pages 17-24 Problem 7: Flow over a Delta Wing....Pages 25-30 Problem 8: Non-equilibrium Flow in an Arc Jet or a Shock Tube....Pages 31-36 Back Matter....Pages 37-39 Front Matter....Pages 41-41 Hypersonic Boundary Layer and Base Flow Workshop Test Problems 1 and 2....Pages 43-62 Computation of Hypersonic Turbulent Flow Over a Rearward Facing Step....Pages 63-74 Hypersonic Cone Flow Predictions Using an Implicit Upwind Space-Marching Code....Pages 75-91 A Synthesis of Results for Test Cases 1 and 2: Hypersonic Boundary Layer and Base Flow....Pages 92-94 Front Matter....Pages 95-95 Experiments on Shock-Wave/Boundary-Layer Interactions Produced by Two-Dimensional Ramps and Three-Dimensional Obstacles....Pages 97-128 An Experimental Contribution to the Flat Plate 2D Compression Ramp, Shock/Boundary Layer Interaction Problem at Mach 14 : Test Case 3.7....Pages 129-151 Viscous, 2-D, Laminar Hypersonic Flows Over Compression Ramps....Pages 152-166 Computational Results for 2-D and 3-D Ramp Flows with an Upwind Navier-Stokes Solver....Pages 167-180 Application of the Galerkin/Least-Squares Formulation to the Analysis of Hypersonic Flows: I. Flow Over a Two-Dimensional Ramp....Pages 181-200 The Application of an Adaptive Upwind Unstructured Grid Solution Algorithm to the Simulation of Compressible Laminar Viscous Flows Over Compression Corners....Pages 201-211 Computation of Flows Over 2D Ramps....Pages 212-227 Hypersonic Viscous Flow Over Two-Dimensional Ramps....Pages 228-243 Front Matter....Pages 95-95 Grid-Refinement Study of Hypersonic Laminar Flow Over a 2-D Ramp....Pages 244-254 Contribution to Problem 3 using a Galerkin Least Square Finite Element Method....Pages 255-267 Computational Results for Flows Over Compression Ramps....Pages 268-284 Implicit Upwind Finite-Difference Simulation of Laminar Hypersonic Flow Over a 2D Ramp....Pages 285-300 A Synthesis of Results on the Calculation of Flow Over a 2D Ramp and a 3D Obstacle : Antibes Test Cases 3 and 4....Pages 301-311 Front Matter....Pages 313-313 Experimental Study of the Longitudinal Hypersonic Corner Flow Field Hermes-R&D Research Program, Problem No. 5....Pages 315-331 Front Matter....Pages 333-333 Experimental Study of the Flow Around a Double Ellipsoid Configuration....Pages 335-357 Solution of the Euler Equations Around a Double Ellipsoidal Shape Using Unstructured Meshes and Including Real Gas Effects....Pages 358-373 Computation of 2D Inviscid Hypersonic Flows Using Unstructured Polygonal Meshes....Pages 374-395 An Upwind Relaxation Method for Hypersonic Viscous Flows Over a Double-Ellipsoidal Body....Pages 396-413 Navier-Stokes Calculations over a double ellipse and a double ellipsoid by an Implicit Non-Centered Method....Pages 414-426 Application of the Galerkin/Least-Squares Formulation to the Analysis of Hypersonic Flows: II. Flow Past a Double Ellipse....Pages 427-450 The Application of an Adaptive Unstructured Grid Method to the Solution of Hypersonic Flows Past Double Ellipse and Double Ellipsoid Configurations....Pages 451-471 Computation of the Hypersonic Flow Over a Double Ellipsoid....Pages 472-493 High Resolution Schemes for Steady Hypersonic Flow....Pages 494-516 Numerical Simulation of Laminar Hypersonic Flow past a Double-Ellipsoid....Pages 517-534 Inviscid and Viscous Flow Calculation Over a Double Ellipse with an Implicit Centered Method....Pages 535-552 2D Hypersonic Viscous Flow Past a Double Ellipse Geometry....Pages 553-565 Hypersonic Flows Over a Double or Simple Ellipse....Pages 566-584 Solving Flow Equations for High Mach Numbers on Overlapping Grids....Pages 585-599 Front Matter....Pages 333-333 An Explicit Finite-Difference Solution of Hypersonic Flows Using Rational Runge-Kutta Scheme....Pages 600-615 Viscous and Inviscid Hypersonic Flow About a Double Ellipsoid....Pages 616-634 Numerical Simulation of Hypersonic Flow over a Double Ellipse using a Taylor-Galerkin Finite Element Formulation with Adaptive Grids....Pages 635-654 Hypersonic Viscous Flow past Double Ellipse and past Double Ellipsoid - Numerical Results....Pages 655-672 Adaptive Mesh Embedding for Reentry Flow Problems....Pages 673-688 Attempt to Evaluate the Computations for Test Case 6.1 - Cold Hypersonic Flow Past Ellipsoidal Shapes -....Pages 689-712 A Staggered Mesh Finite Difference Scheme for the Computation of Hypersonic Euler Flows....Pages 713-730 Reactive Flow Computations by Upwind Finite Elements....Pages 731-748 Numerical analysis of chemically reacting inviscid flow in 2-D....Pages 749-764 A Contribution to the Prediction of Hypersonic Non-Equilibrium Flows....Pages 765-781 Reactive and Inert Inviscid Flow Solutions by Quasi-linear Formulations and Shock Fitting....Pages 782-797 Inviscid Calculations by an Upwind Finite Element Method of Hypersonic Flows over a Double (Single) Ellipse....Pages 798-814 Contribution to Problem 6 using an upwind Euler solver with unstructured meshes....Pages 815-831 Inviscid Hypersonic Flow Simulations using an Explicit Scheme....Pages 832-847 Computation of Thermochemical Nonequilibrium Flows around a Simple and a Double Ellipse....Pages 848-870 Some Comments on the Numerical Computations of Reacting Flows over the Double-Ellipse (Double Ellipsoid)....Pages 871-881 DSMC Calculations for The Double Ellipse....Pages 882-895 Problem 6.4.1: Rarefied Flow Around A Double Ellipse....Pages 896-911 The Hypersonic Double Ellipse in Rarefied Flow Problem 6.4....Pages 912-923 Front Matter....Pages 925-925 Leeside Flow over Delta Wing at M = 7.15 Experimental results for Test Case 7.1.2....Pages 927-932 Front Matter....Pages 925-925 Hypersonic Delta Wing Flow Calculations using a Multidomain MUSCL Euler Solver....Pages 933-946 Finite Volume 3DNS and PNS Solutions of Hypersonic Viscous Flow Around a Delta Wing using Osher’s Flux Difference Splitting....Pages 947-959 Inviscid Hypersonic Flow Over a Delta Wing....Pages 960-980 Hypersonic Leeside Delta-Wing-Flow Computations Using Centered Schemes....Pages 981-1005 Evaluation of Contributions for Test Case 7.1.1. and 7.1.2.....Pages 1006-1016 Experimental Density Flowfields over a Delta Wing Located in Rarefied Hypersonic Flows....Pages 1017-1030 Experiments on the Heat Transfer and on the Aerodynamic Coefficients of a Delta Wing in Rarefied Hypersonic Flows....Pages 1031-1050 DSMC Calculations for The Delta Wing....Pages 1051-1066 Rarefied Gas Flow Around a 3D-Deltawing....Pages 1067-1078 Appraisal of the Rarefied Flow Computations (Problems 6.4.1 and 7.2.1)....Pages 1079-1086 Front Matter....Pages 1087-1087 Study of A Nitrogen D.C. Plasma Torch at Different Pressures Using Optical and Thermal Diagnostics....Pages 1089-1101 Non Equilibrium Flow in an Arc-Jet....Pages 1102-1115 Non-equilibrium Flow in an Arc Heated Wind Tunnel....Pages 1116-1130 Calculation of non-equilibrium flows in a high-enthalpy wind tunnel....Pages 1131-1144 Application of Program Laura to Thermochemical Nonequilibrium Flow Through a Nozzle....Pages 1145-1158 Nonequilibrium Flow in a Hypersonic Wind Tunnel Nozzle....Pages 1159-1173 Non-Equlibrium Flow in a Hypersonic Wind Tunnel Nozzle....Pages 1174-1192 Quasi Monodimensional Inviscid Non Equilibrium Nozzle Flow Computation....Pages 1193-1205 Non-Equilibrium Flow in an Arcjet or a Shock Tube: Synthesis....Pages 1206-1218 Front Matter....Pages 1219-1219 General Synthesis....Pages 1221-1228 Back Matter....Pages 1229-1230 This Entry Describes The Experimental Work Conducted In The Department Of Aeronautics At Imperial College In Connection With Test Problems 1 And 2 Of The Workshop On Hypersonic Flows For Reentry Problems, Part I. These Are Defined As Follows: Test Problem 1 Flow Over A Slender Cone Test Problem 2 Turbulent Base Flow The Main Requirement Of This Text Is To Present The Experimental Data For Direct Comparison With The Predictions Of Cfd Codes. We Have Therefore Concentrated Mainly On A Factual Statement Of Measuring Techniques And Results, Together With An Assessment Of Experimental Accuracy. Future Publications Will Be Devoted To More Extensive Physical Interpretations And Discussions Of The Results. We Have Produced A Large Volume Of Data, Some Of Which Were Categorised As Mandatory And Some As Optional For The Purposes Of Cfd Validation. However, Only The Mandatory Data Are Presented Here, Although The Other Data Are Available And Will Be Published Separately Later. 2. Experimental Arrangement 2. 1 The Test Facility The Experiments Were Conducted In The Imperial College No. 2 Gun Tunnel. This Facility Is A Conventional Intermittent Blowdown Tunnel With A Contoured Mach 9 (nominal) Axisymmetric Nozzle Fed By A Free Piston Compression Heater. The Operating Condition Under Which The Data Contained In This Report Were Obtained Is Presented In Table 1. Test 2 T (ok) M B. Mlm Po (n/m ) Re/m T (ok) Ix) Ix) Case Ix) W 1. 1 7 7 +0. 14 9. 16 6. 67x10 5. 5xl0 59. The Physical Modelling And The Numerical Simulation Of The Critical Reentry Phase Of Hypersonic Space Vehicles Are Important Areas Of Aerospace Research. Eight Specific Problems Of Aerodynamics And Thermodynamics Were Chosen As The Central Topics Of This Workshop. In These Two Volumes Bothexperimental And Computational Data Are Collected Along With Comparative Reviews Presented At The Meeting By International Experts In The Field Of Hypersonic Flows. The Books Will Be An Important Reference And The Data Will Be Valuable For Numerical Simulations Of Hypersonic Flows And Theirapplications In Physics And Engineering. Edited By Jean-antoine Désidéri, Roland Glowinski, Jacques Périaux.