Test bench dimensioned by specific numerical tool

Abstract

One of the main issues of hypersonic flight is the thermal management of the overall vehicle. In order to simulate the behaviour of a complete actively cooled Supersonic Combustion Ramjet, a one-dimensional transient numerical model has been developed with heat and mass transfer particularly in a cooling channel for supercritical fuel under pyrolysis. It uses a detailed pyrolysis mechanism for n-dodecane (1185 reactions and 153 species). A further validation of the model, based on experimental and numerical data, is presented in this paper. The hydrodynamic behaviour is considered to be good enough for this numerical tool as the accuracy of fluid velocity computation is about few percents. The model is quantitatively validated under stationary conditions for both hydrodynamic and thermal aspects. The discrepancies between computed and experimental data remain close to 5 % or less on a thermal point of view. Furthermore, good agreement is found with transient experimental test case. Discrepancies are analysed and they remain in an acceptable range of a tenth of degree. A validation of the chemistry is provided thanks to experimental results. The pyrolysed mixture's compositions are well reproduced with only few percents of error. RESPIRE is now considered to be validated and it brings further analysis of the experimental data obtained with the new pyrolysis bench. Some interesting examples of use are given.

Pyrolysis in Porous Media: Part 2. Numerical Analysis and Comparison to Experiments

“…The COMPARER pyrolysis test bench is used to pressurize and to heat the fuel under flow conditions (Gascoin et al, 2008b). Its main characteristics are the following:…”

Pyrolysis in Porous Media: Numerical Analysis and Comparison to Experiments

“…The COMPARER pyrolysis test bench is used to pressurize and to heat the fuel under flow conditions [24]. Its main characteristics are the following:…”