Speaker
Description
The aerothermal characterization of the instrumentation package COMARS+ of the Schiaparelli lander of the Exomars 2016 mission has been carried out in Martian flow environment of the arc heated facility L2K. The combined sensors COMARS and the broadband radiometer for radiative heat flux measurements were able to successfully measure the radiative heat flux on the back cover close to the vehicle shoulder for the first time on a Mars entry vehicle. To allow further validation of the numerical codes applied to simulate flow field and radiation properties of the EXOMARS COMARS+ flight data from Schiaparelli capsule descent phase (Test cases test cases TC1A), further Martian atmosphere experiments in DLR’s arc heated facility L2K with dedicated diagnostics are being performed. Two test case flow conditions with different enthalpies have been identified for a mixture of 97% carbon dioxide and 3% nitrogen representing the chemical composition of Martian atmosphere to measure thermochemical and radiation properties in the free stream and behind a shock layer of a scaled model of the Schiaparelli capsule.
The COMARS+ broadband radiometer is used to measure the radiation properties of both the free stream and the shock region. For characterization of the thermochemical properties of free stream and shock region non-intrusive spectroscopic measurement techniques as Fourier Transformed InfraRed spectroscopy (FTIR), UV-VIS Emission Spectroscopy (ES), Laser Induced Fluorescence spectroscopy (LIF), and Diode Laser Absorption Spectroscopy (DLAS) are used. Additionally profiles of Pitot pressure and heat flux have been measured to verify homogeneity of the free stream at the model location.
Summary
The aerothermal characterization of the instrumentation package COMARS+ of the Schiaparelli lander of the Exomars 2016 mission has been carried out in Martian flow environment of the arc heated facility L2K. The combined sensors COMARS and the broadband radiometer for radiative heat flux measurements were able to successfully measure the radiative heat flux on the back cover close to the vehicle shoulder for the first time on a Mars entry vehicle. To allow further validation of the numerical codes applied to simulate flow field and radiation properties of the EXOMARS COMARS+ flight data from Schiaparelli capsule descent phase (Test cases test cases TC1A), further Martian atmosphere experiments in DLR’s arc heated facility L2K with dedicated diagnostics are being performed. Two test case flow conditions with different enthalpies have been identified for a mixture of 97% carbon dioxide and 3% nitrogen representing the chemical composition of Martian atmosphere to measure thermochemical and radiation properties in the free stream and behind a shock layer of a scaled model of the Schiaparelli capsule.
The COMARS+ broadband radiometer is used to measure the radiation properties of both the free stream and the shock region. For characterization of the thermochemical properties of free stream and shock region non-intrusive spectroscopic measurement techniques as Fourier Transformed InfraRed spectroscopy (FTIR), UV-VIS Emission Spectroscopy (ES), Laser Induced Fluorescence spectroscopy (LIF), and Diode Laser Absorption Spectroscopy (DLAS) are used. Additionally profiles of Pitot pressure and heat flux have been measured to verify homogeneity of the free stream at the model location.
