Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
ON THE USE OF NUMERICAL APPROXIMATE METHODS FOR PREDICTING THE HEAT TRANSFER DURING THE ATMOSPHERIC RE-ENTRY OF A BLUNT BODY
Submission Author:
Filipe Silva , PR , Brazil
Co-Authors:
Filipe Silva, Francisco Augusto Aparecido Gomes
Presenter: Filipe Silva
doi://10.26678/ABCM.COBEM2021.COB2021-1008
Abstract
This work objective is to evaluate the heat transfer in the stagnation point of a space vehicle with a blunt body geometry during its entrance into the atmosphere. These data are extremely important for the development of a thermal protection system. The five approximate methods used were: Tauber, Van Driest, Fay-Riddell, Detra-Hidalgo, and Sutton-Graves, all these methods were implemented in a programming language known as Fortran 90/95 along with the Standard Atmosphere of 1976 and other four methods to obtain the air properties after the normal shock wave, where one of these methods is the perfect gas model and the other three are the thermodynamic equilibrium. The integration of the heat flux with respect to the trajectory time results in the heat load, in the present work it was considered three different wall temperatures in the vehicle: 1000 K, 2000K, and 3000 K. Lastly, it’s shown the graphics of the heat flux with respect to trajectory time, and then a comparison between the heat load for each method. The heat flux method that presented the highest values of heat load was Detra-Hidalgo with 264.0 MJ/m2 for a wall temperature of 1000 K and 209.0 MJ/m2 in a 3000 K wall temperature.
Keywords
Aerothermodynamics, Atmospheric Entry, Heat transfer, Stagnation Point, Thermodynamic Equilibrium
