Analysis and modelling of rotating detonation engine refill structures

IF 5.8 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-10-02 DOI:10.1016/j.ast.2025.110970

Quentin Michalski , John Grunenwald , Venkat Athmanathan , James Braun

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引用次数: 0

Abstract

This study presents a novel low-order model for the fresh gas region in Rotating Detonation Engines (RDEs), developed and verified against high-fidelity 2D computational fluid dynamics (CFD) simulations. The fresh gas model provides direct closure for the refill mechanism and can be readily implemented in other 1D or 2D RDE models. The model captures the spatially varying pressure and thermodynamic structure of the refresh layer via a linearised Method of Characteristics (MOC), accounting for the expansion process in the slip line and incorporating mass flow conservation. For the first time, the model incorporates a fully analytical treatment of stagnation pressure losses within the fresh gas layer, primarily attributed to spatial gradients within the injection region. The influence of front lift and associated fresh gas recirculation is also analysed, demonstrating a significant impact on the detonation front height and pressure gain. The model exhibits strong agreement with CFD data across multiple operating conditions, providing a practical tool for predicting spatially resolved refill conditions and enabling a more accurate prediction of post-detonation flow behavior in canonical air-breathing and rocket RDE systems compared with existing models.

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旋转爆震发动机再燃结构分析与建模

本研究提出了一种新的旋转爆震发动机（RDEs）新鲜气体区域的低阶模型，并通过高保真二维计算流体动力学（CFD）模拟进行了开发和验证。新鲜气体模型为重新填充机制提供了直接的封闭，并且可以很容易地在其他1D或2D RDE模型中实现。该模型通过线性化特征法（MOC）捕捉了刷新层的空间变化压力和热力学结构，考虑了滑移线中的膨胀过程，并考虑了质量流守恒。该模型首次对新鲜气层内的停滞压力损失进行了全面的分析处理，主要归因于注入区域的空间梯度。分析了前升力和伴随的新鲜气体再循环对爆轰锋面高度和压力增益的影响。与现有模型相比，该模型与多种工况下的CFD数据具有很强的一致性，为预测空间分辨的再填充条件提供了实用工具，并且能够更准确地预测标准吸气和火箭RDE系统的爆轰后流动行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.