Hysteresis phenomenon in oblique detonation wave/boundary layer interactions

IF 6.2 2区工程技术 Q2 ENERGY & FUELS

Combustion and Flame Pub Date : 2025-08-18 DOI:10.1016/j.combustflame.2025.114399

Xin Han, Ruofan Qiu, Yancheng You

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引用次数: 0

Abstract

This paper investigates the hysteresis phenomenon in the interaction between the oblique detonation wave (ODW) and the turbulent boundary layer within the oblique detonation engine (ODE) combustor. The oblique detonation wave within the combustor reflects downstream of the expansion corner on the upper wall, causing boundary layer separation. Hysteresis phenomenon has been observed in the flow field as the upper wall expansion angle varies along a loop. The hysteresis is categorized into three types: 1) hysteresis of boundary layer separation, 2) hysteresis of the reflection pattern formed by the incident ODW and separation shock wave, and 3) hysteresis in thrust performance. The first type of hysteresis arises from the irreversibility of boundary layer separation. Hysteresis in the reflection pattern is dominated by inviscid mechanisms. That is, under the inflow conditions considered in this paper, a dual-solution domain exists for the inviscid reflections of the asymmetric shock wave and detonation wave. Polar analysis provides an angular interval where the transition from regular to Mach reflection occurs. However, it does not identify the dual-solution domain, which shows the limitations of polar analysis in shock and detonation wave reflections. The physical dissipation in the viscous simulation enables the regular reflection to persist even when the intensity of the separation shock slightly exceeds the inviscid transition angle. The hysteresis in thrust performance is a result of the reflection pattern hysteresis, with the presence of the Mach stem leading to a loss in thrust performance. An in-depth understanding of hysteresis is essential for the engineering applications of ODEs, particularly for their active control.

Novelty and significance statement

The novelty of this work lies in the first identification of hysteresis induced by looped variations in wall configuration within a space-confined viscous ODE combustor. This paper presents a detailed investigation of the asymmetric reflection of shock waves and oblique detonation waves, providing angular intervals for the transition from regular to Mach reflections based on polar analysis. Furthermore, the dual-solution domain, which cannot be accurately captured by conventional polar analysis, is revealed through inviscid numerical simulations.

The significance of this research is twofold: it reveals the hysteresis phenomenon within an ODE combustor, enhancing the understanding of detonation wave dynamics, and it offers critical insights into the active control of ODE flow fields.

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斜爆震波/边界层相互作用中的迟滞现象

本文研究了斜爆震发动机燃烧室内斜爆震波与湍流边界层相互作用时的滞回现象。燃烧室内的斜爆震波向膨胀角下游反射到上壁上，造成边界层分离。上壁面膨胀角沿回路变化时，流场中存在滞回现象。迟滞可分为三种类型：1)边界层分离迟滞，2)入射ODW和分离激波形成的反射图样迟滞，3)推力性能迟滞。第一类迟滞是由边界层分离的不可逆性引起的。反射模式中的迟滞主要是由非粘滞机制控制的。即在本文所考虑的入流条件下，非对称激波和爆震波的无粘反射存在双解域。极坐标分析提供了从规则反射到马赫反射发生转变的角度间隔。然而，它没有识别双解域，这表明极性分析在激波和爆震波反射中的局限性。粘性模拟中的物理耗散使规则反射即使在分离激波强度略超过非粘性过渡角时也能持续存在。推力性能的迟滞是反射型迟滞的结果，马赫杆的存在导致推力性能的损失。深入了解迟滞对于ode的工程应用至关重要，特别是对于其主动控制。新颖性和意义声明：这项工作的新颖性在于首次确定了由空间受限粘性ODE燃烧室壁面结构的环形变化引起的迟滞。本文对激波和斜爆震波的不对称反射进行了详细的研究，给出了基于极坐标分析从规则反射过渡到马赫反射的角间隔。此外，通过非粘数值模拟揭示了传统极性分析无法准确捕获的双解域。本研究具有双重意义：它揭示了ODE燃烧室内的滞后现象，增强了对爆震波动力学的理解，并为ODE流场的主动控制提供了重要的见解。

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

Combustion and Flame 工程技术-工程：化工

CiteScore

9.50

自引率

20.50%

发文量

631

审稿时长

3.8 months

期刊介绍： The mission of the journal is to publish high quality work from experimental, theoretical, and computational investigations on the fundamentals of combustion phenomena and closely allied matters. While submissions in all pertinent areas are welcomed, past and recent focus of the journal has been on: Development and validation of reaction kinetics, reduction of reaction mechanisms and modeling of combustion systems, including: Conventional, alternative and surrogate fuels; Pollutants; Particulate and aerosol formation and abatement; Heterogeneous processes. Experimental, theoretical, and computational studies of laminar and turbulent combustion phenomena, including: Premixed and non-premixed flames; Ignition and extinction phenomena; Flame propagation; Flame structure; Instabilities and swirl; Flame spread; Multi-phase reactants. Advances in diagnostic and computational methods in combustion, including: Measurement and simulation of scalar and vector properties; Novel techniques; State-of-the art applications. Fundamental investigations of combustion technologies and systems, including: Internal combustion engines; Gas turbines; Small- and large-scale stationary combustion and power generation; Catalytic combustion; Combustion synthesis; Combustion under extreme conditions; New concepts.