New Trends in Instrumentation for Hypersonic Research

Because of the growing interest in hypersonic flows, the AGARD Fluid Dynamics Panel initiated a sub-working group on instrumentation for hypersonics in 1989. This sub-group, chaired by J. WENDT (VKI -Belgium), was composed of: A. BOUTIER (ONERA -France), K. BUTEFISCH (DLR -Germany), R. CATTOLICA (SANDIA Lab. -USA), V. CLINE (AEDC -USA), A. GIRARD (ONERA -France), R. McKENZIE (NASA Ames -USA), S. OCHELTREE (NASA Langley -USA) and G. SMEETS (ISL -Franco-German Inst.). As a result of several meetings, the idea came to organize this workshop, 27th April - 1st May 1992, on "New Trends in Instrumentation for Hypersonic Research", at Le Fauga-Mauzac ONERA center, in France, where the new hot-shot arc-heated facility F4, as well as a new conference building, were recently completed. This workshop has been organized in close connection with the AGARD FDP Symposium to be held in Torino 4 - 8 May 1992 on "Theoretical and Experimental Methods in Hypersonic Flows": the main conclusions and ideas expressed by the papers and during the discussions of this workshop are reported in session 7 and have been presented in Torino in a special Instrumentation session. As chairman of this workshop, I express many thanks to the Organizing Committee composed of Karl BUTEFISCH, Andre GIRARD, Stewart OCHELTREE and John WENDT for their very constructive help, leading to a meeting that was recognized to be very fruitful for all the participants.

Session 1: Projects - Requirements.- Requirements for facilities and measurement techniques to support CFD development for hypersonic aircraft.- Hermes measurement needs in hot facilities.- Hot experimental technique: a new requirement of aerothermodynamics.- Experimental validation of hypersonic viscous flow models.- Computation and experimentation of free-piston shock tunnels - Example of the Marseille facility.- Ground test facilities and instrumentation for aerothermal and aero-optical studies of hypersonic interceptors.- Session 2: Interferometry - Spectroscopy.- Interferometry in rarefied gas flows.- Holographic interferometry on the high enthalpy shock tunnel in Göttingen (HEG).- The use of holographic interferometry for flow field diagnostics.- Multipass holographic interferometer for the high enthalpy hypersonic wind-tunnel F4.- Resonant holographic interferometry; a multipoint, multiparameter diagnostics tool for hypersonic flow.- Schlieren device and spectroscopic measurements in F4.- Considerations for the application of the infrared emission absorption technique to hypersonic propulsion diagnostics.- Molecular electronic resonance state techniques.- Session 3: Temperatures - Concentrations.- Local non-intrusive measurements of the inlet and exhaust flows in ground testing a hypersonic engine.- Laser-based diagnostics for hypersonic flows.- Determination of minority species concentrations and temperature in combustion systems by Laser Induced Fluorescence.- Absorption, scattering, and fluorescence techniques for hypersonic flow measurements.- Spectroscopic diagnostic techniques for the high enthalpy shock tunnel in Göttingen (HEG): preparatory LIF studies on other facilities.- Rotational temperature and density measurements in a hypersonic flow by dual-line CARS.- Laser spectroscopic measurement techniques for hypersonic, turbulent windtunnel flows.- Broad band excimer Laser Induced Fluorescence applied to hypersonic and supersonic air flows.- Non-intrusive temperature determination by LIF in hypersonic wind-tunnels.- Rapid pulse electron beam fluorescence for flow field diagnostics.- Electron beam fluorescence imaging for hypersonic research.- Session 4: Pressure - Forces.- Force measurement in hypervelocity impulse facilities.- A six component balance for short duration hypersonic facilities.- Millisecond aerodynamic force measurement technique for high enthalpy test facilities.- Aerodynamic force measurements in the VKI longshot hypersonic facility.- Session 5: Velocity.- Measurement of hypersonic flows.- Development and assessment of an LDV system for Mach 6 flow field measurements.- Laser velocimetry applied in hypersonics.- Velocity and density determination by the electron beam technique.- Electron beam velocimetry.- Planar velocimetry in high-speed aerodynamic and propulsion flowfields.- Filtered Rayleigh and RELIEF imaging of velocity, temperature and density in hypersonic flows for the study of boundary layers, shock structures, mixing phenomena and the acquisition of in-flight air data.- 2D velocity and temperature measurements in high speed flows based on spectrally resolved Rayleigh scattering.- Session 6A: Heat Flux.- Temperature and heat flux measurements challenges for high temperature aerospace application.- Heat transfer measurement techniques used or in development at ONERA Chalais-Meudon.- Aerothermodynamic measurement techniques employed in NASA Langley hypersonic facilities.- Aerothermal test methodology and techniques for the development of hypersonic vehicles.- Measurements on models for hypersonic real gas conditions.- Thin gradient heat fluxmeters developed at ONERA.- Session 6B: Infrared Thermography.- Hypersonic aerodynamics research with an infrared imaging system.- Heat transfer measurements using infrared thermography in rarefied flows.- Infrared thermography for hot-shot wind-tunnel.- Experiments on the catalytic efficiency of heat protection materials in the arc heated wind-tunnel (LBK) in Cologne.- Infrared Thermography characterization of Görtler vortex type patterns in hypersonic flows.- Session 7: Recommendations for Future Research by the Rapporteurs.- to session 7: Recommendations for future research in hypersonic instrumentation.- Flow visualization, interferometry and spectroscopy in hypersonic flows: a review.- Local measurements of temperatures and concentrations: a review for hypersonic flows.- Pressure and force measurement on models set in hypersonic flows: a review.- Velocity measurements in hypersonics: a review.- Thermal flux measurements in hypersonic flows: a review.