Influence of Aerothermoelasticity on Performance of Oblique Detonation Wave Engines

Paper


Gewali, Sandip, Pandey, Anup, Poudel, Nishchal, Adhikari, Sanjeev and Bhattrai, Sudip. 2025. "Influence of Aerothermoelasticity on Performance of Oblique Detonation Wave Engines." AIAA SciTech Forum 2025. Orlando, FL, United States 06 - 10 Jan 2025 United States. https://doi.org/10.2514/6.2025-1534
Paper/Presentation Title

Influence of Aerothermoelasticity on Performance of Oblique Detonation Wave Engines

Presentation TypePaper
AuthorsGewali, Sandip, Pandey, Anup, Poudel, Nishchal, Adhikari, Sanjeev and Bhattrai, Sudip
Number of Pages27
Year2025
Place of PublicationUnited States
ISBN9781624107238
Digital Object Identifier (DOI)https://doi.org/10.2514/6.2025-1534
Web Address (URL) of Paperhttps://arc.aiaa.org/doi/10.2514/6.2025-1534
Web Address (URL) of Conference Proceedingshttps://arc.aiaa.org/doi/book/10.2514/MSCITECH25
Conference/EventAIAA SciTech Forum 2025
Event Details
AIAA SciTech Forum 2025
Delivery
In person
Event Date
06 to end of 10 Jan 2025
Event Location
Orlando, FL, United States
AbstractOblique Detonation Wave Engines (ODWEs) possess high prospects as an airbreathing propulsive system for high-speed vehicles due to shorter combustor length, high specific impulse, and high specific heat release. However, thin compliant panels used in compression ramp, over which oblique detonation waves are stabilized, are susceptible to aerothermoelastic oscillation. This study investigates aerothermoelastic response of the compression ramp and its effect on total pressure recovery and combustion efficiency of the ODWEs using coupled fluid-structure interaction (FSI) simulations at two distinct temperatures (298 K and 500 K) and a coupled fluid-thermal-structure interaction (FTSI) simulation. Using preCICE coupling library, a partitioned approach to multiphysics simulations is used to couple in-house OpenFOAM-based compressible reacting flow solver: rhoCentralReactingFoam with thermo-structural solver: CalculiX. The ramp oscillated around a constant mean position in FSI simulations while the mean position continuously shifted downwards in the FTSI simulation due to thermomechanical deformation and thermal degradation of the ramp material caused by transient diffusive heat transfer. In all FSI and FTSI simulations, total pressure recovery and combustion efficiency showed a strong positive and negative correlation respectively with the ramp's displacement. A maximum of 39.5% increase in total pressure recovery and a 9.5% decrease in combustion efficiency was observed due to aerothermoelastic deformation of the ramp. Heat flux at the reattachment region increased due to an increase in wall temperature while heat flux decreased towards the ramp's tip due to the effect of the ramp's downward displacement. This highlights the need for an effective thermal protection system, especially in the reattachment region. A study on damping characteristics showed that an increase in wall temperature from 298K to 500K in FSI simulations reduced the damping ratio of the oscillations by about 2 times while it reduced by a factor of about 2.5 after simulation time of 20 ms in FTSI simulation. FTSI simulation for extended physical time is suggested to fully characterize flutter tendencies as the temperature increases.
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 20204001. Aerospace engineering
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Byline AffiliationsInstitute of Engineering, Nepal
University of Kansas, United States
University of Southern Queensland
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