This work aims to study the high-temperature hypersonic flow around a small vehicle for a Venus’ atmosphere sampling in order to compute the convective wall heating. The semi-empirical Sutton-Graves correlation were used beyond their limitations for a preliminary estimation for relevant trajectory points where heat fluxes could be maximum. Aerothermal CFD simulations were performed for six trajectory points comprising freestream velocities up to 10.8 km/s. The simulations were performed using the SPARK CFD code, developed and maintained at Instituto de Plasmas e Fusao Nuclear. A comparison between the CFD results and the correlation showed that the Sutton-Graves correlation largely overpredicted the convective heat fluxes, reasserting their inadequacy for this case. An aerothermal analysis at the peak heating point was performed, and the high-temperature flowfield around the vehicle was characterized. Furthermore, different flowfield models were compared and discussed regarding their accuracy and computational cost. This work was made possible by a teamwork with a group of colleagues. Working together on a new Concurrent Design Facility developed at Instituto Superior Tecnico de Lisboa, we were able to share data and help each other to pursue our goal.

This work aims to study the high-temperature hypersonic flow around a small vehicle for a Venus’ atmosphere sampling in order to compute the convective wall heating. The semi-empirical Sutton-Graves correlation were used beyond their limitations for a preliminary estimation for relevant trajectory points where heat fluxes could be maximum. Aerothermal CFD simulations were performed for six trajectory points comprising freestream velocities up to 10.8 km/s. The simulations were performed using the SPARK CFD code, developed and maintained at Instituto de Plasmas e Fusao Nuclear. A comparison between the CFD results and the correlation showed that the Sutton-Graves correlation largely overpredicted the convective heat fluxes, reasserting their inadequacy for this case. An aerothermal analysis at the peak heating point was performed, and the high-temperature flowfield around the vehicle was characterized. Furthermore, different flowfield models were compared and discussed regarding their accuracy and computational cost. This work was made possible by a teamwork with a group of colleagues. Working together on a new Concurrent Design Facility developed at Instituto Superior Tecnico de Lisboa, we were able to share data and help each other to pursue our goal.

CFD modeling of Venus aerocapture flow

PAVANELLO, MARCO
2021/2022

Abstract

This work aims to study the high-temperature hypersonic flow around a small vehicle for a Venus’ atmosphere sampling in order to compute the convective wall heating. The semi-empirical Sutton-Graves correlation were used beyond their limitations for a preliminary estimation for relevant trajectory points where heat fluxes could be maximum. Aerothermal CFD simulations were performed for six trajectory points comprising freestream velocities up to 10.8 km/s. The simulations were performed using the SPARK CFD code, developed and maintained at Instituto de Plasmas e Fusao Nuclear. A comparison between the CFD results and the correlation showed that the Sutton-Graves correlation largely overpredicted the convective heat fluxes, reasserting their inadequacy for this case. An aerothermal analysis at the peak heating point was performed, and the high-temperature flowfield around the vehicle was characterized. Furthermore, different flowfield models were compared and discussed regarding their accuracy and computational cost. This work was made possible by a teamwork with a group of colleagues. Working together on a new Concurrent Design Facility developed at Instituto Superior Tecnico de Lisboa, we were able to share data and help each other to pursue our goal.
2021
CFD modeling of Venus aerocapture flow
This work aims to study the high-temperature hypersonic flow around a small vehicle for a Venus’ atmosphere sampling in order to compute the convective wall heating. The semi-empirical Sutton-Graves correlation were used beyond their limitations for a preliminary estimation for relevant trajectory points where heat fluxes could be maximum. Aerothermal CFD simulations were performed for six trajectory points comprising freestream velocities up to 10.8 km/s. The simulations were performed using the SPARK CFD code, developed and maintained at Instituto de Plasmas e Fusao Nuclear. A comparison between the CFD results and the correlation showed that the Sutton-Graves correlation largely overpredicted the convective heat fluxes, reasserting their inadequacy for this case. An aerothermal analysis at the peak heating point was performed, and the high-temperature flowfield around the vehicle was characterized. Furthermore, different flowfield models were compared and discussed regarding their accuracy and computational cost. This work was made possible by a teamwork with a group of colleagues. Working together on a new Concurrent Design Facility developed at Instituto Superior Tecnico de Lisboa, we were able to share data and help each other to pursue our goal.
CFD
Aerotermodinamica
Aerodinamica
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12608/40009