Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Theorical and experimental heat transfer in rocket engine with solid propellant
Submission Author:
Izabel Vicentin , PR
Co-Authors:
Carlos Henrique Marchi, Antonio Carlos Foltran, Diego Fernando Moro, Nicholas Dicati Pereira da Silva, Marcos Campos, Luciano Araki, Izabel Vicentin
Presenter: Izabel Vicentin
doi://10.26678/ABCM.COBEM2017.COB17-1322
Abstract
Accurate determination of heat flux is an important task not only in designing but also in calculation of the performance of rocket engines. In a trust chamber, the amount of energy transferred as heat to the chamber walls could cause structural failure. Thus, to prevent the chamber and nozzle walls from fail, it is necessary the knowledge of heat flux accurately. Experimental measurements or calculus by correlations causes large uncertainties in heat transfer determination. In order to solve this problem, Inverse Heat Conduction Problem (IHCP) can be used. In this approach, the heat flux varying in time is determined from experimental data measured at the outer side wall of the rocket engine. The inverse problem is solved by least squares modified by the addition of Tikhonov regularization term of zero order. The sensitivity coefficients were obtained by Duhamel's theorem, so the methodology is applicable to linear problems. The physical phenomenon was modeled by Fourier equation in cylindrical coordinates. By using the regularization parameter, it was possible to generate good results even using data with considerable experimental errors.
Keywords
Combustion Chamber, Tikhonov regularization, Heat flux, Inverse Heat Condution Problem
