Work

Numerical Study of the Induction Length Effect on Oblique Detonation Waves

Year: 2025

Type: article

Abstract: The typical structure of an oblique detonation wave (ODW) consists of a leading shock wave followed by a coupled shock-flame complex. The distance from the leading shock’s originating point to the ignition onset is referred to as the induction length. This work numerically studies the induction length effect using a two-step induction-reaction kinetic model. Results reveal that the induction length governs the transition pattern of ODWs. By testing four distinct induction lengths, four ODW regimes are identified, including a prompt ODW, a delayed smooth ODW, a delayed abrupt ODW, and a delayed abrupt ODW with an upstream triple point in oscillatory motion. The mechanisms behind these regimes are analyzed in detail. Additionally, hysteresis is observed when the induction length decreases from a larger value, demonstrating that this phenomenon can be influenced by the kinetic process.

Source: Aerospace

DOI: 10.3390/aerospace12090792

Authors: Shilong Sun, Yu Liu, Gaoxiang Xiang

Institutions: Northwestern Polytechnical University, China Aerodynamics Research and Development Center

Language: English

Topic: Computational Fluid Dynamics and Aerodynamics

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funders: Aerospace Technology Institute, National Natural Science Foundation of China, China Aerodynamics Research and Development Center