What question did this study set out to answer?

This research aims to study how on-wedge bumps improve the initiation and stabilization of oblique detonation waves in engines.

April 7, 2026AIAA Journal

Initiation and Propulsive Performance of Bump-Induced Oblique Detonation Waves

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Numerical analysis demonstrates enhanced combustion performance in oblique detonation engines through bump-induced initiation mechanisms.

This research aims to study how on-wedge bumps improve the initiation and stabilization of oblique detonation waves in engines.
Numerical investigation using two-dimensional reactive Euler equations.
Application of a simplified two-step chemical kinetic model.
Analysis of a fuel-rich hydrogen–air mixture at 45 km altitude.
Assessment of bump pattern and geometric effects on wave structure.
Enhanced maximum specific impulse by up to 11.2% with bump compared to bump-free case.
Bump triggers wall-adjacent combustion at low Mach numbers and promotes quasi-steady ODW at high Mach numbers.
Introduction of a nondimensional detachment intensity parameter for assessing wave structures.

Yan et al. (2026) studied this question.

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