Extrapolation from High Enthalpy Tests to Flight Based on the Concept of Local Heat Transfer Simulation
Abstract
The concept of the local heat transfer simulation (LHTS) of the high enthalpy flow action on a vehicle stagnation point formulated in refs. 1, 2 is based on the requirement to locally provide in a ground test the same boundary layer on the model at the stagnation point as at the re- entry conditions. The present methodology of the extrapolation from ground to flight consists of the three main parts: 1) the recalculation of the test conditions to flight parameters, 2) the prediction of the test conditions for the given hypersonic flight parameters and 3) the validation of the extrapolation procedure. The application and validation of this concept are carried out through the comparative analysis of the computed heat transfer rates and profiles of the gas temperature and atoms fractions within boundary layers near the model in the subsonic high enthalpy air flow and near the blunt body in the hypersonic air flow, whose parameters are extrapolated from the inductively heated air plasma experiment. It is established that the LHTS concept provides an excellent accuracy if air temperatures at the outer edges of both boundary layers near a model and a body are close to equilibrium values, or if the surface has a high or moderate catalycity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2000
- Accession Number
- ADP010749
Entities
People
- A. F. Kolesnikov