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PraVaHa
Context
The Indian Space Research Organisation (ISRO) has developed Computational Fluid Dynamics (CFD) software named Parallel RANS Solver for Aerospace Vehicle Aero-thermo-dynamic Analysis (PraVaHa).
About PraVaHa:
- PraVaHa is a Computational Fluid Dynamics (CFD) software developed by the Indian Space Research Organisation (ISRO) at the Vikram Sarabhai Space Centre (VSSC).
- It's designed to simulate airflow around various aerospace vehicles, including launch vehicles, re-entry vehicles with and without wings, and internal flows.
- Currently, it can simulate airflow under both Perfect Gas and Real Gas conditions. Work is ongoing to simulate chemical reactions during air dissociation and combustion, particularly relevant for scramjet vehicles.
Need of PraVaHa:
- PraVaHa is crucial for initial aerodynamic design studies of launch vehicles, as it evaluates numerous configurations efficiently.
- Aerospace vehicles face severe aerodynamic and aerothermal loads during launch and re-entry due to external pressure and heat flux. PraVaHa helps in understanding and predicting these loads.
- It's vital for designing the shape, structure, and Thermal Protection System (TPS) required for these vehicles.
- The software is also used to address issues like unsteady aerodynamics and acoustic noise generated during missions.
Significance:
- PraVaHa is expected to replace commercial software for most CFD simulations related to aerodynamic characterization.
- It's not only beneficial for ISRO's programs like Gaganyaan but also aids academia and other institutions working on missile, aircraft, and rocket design.
- In the Gaganyaan program, PraVaHa has been extensively used for the aerodynamic analysis of human-rated launch vehicles, including HLVM3, Crew Escape System (CES), and Crew Module (CM).
Practice MCQ:Q. What does ‘PraVaHa’ stand for in the context of aerospace technology?
Solution: (b) |
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