Realization of a standing normal detonation for hypersonic propulsion

IF 5.8 2区工程技术 Q2 ENERGY & FUELS Combustion and Flame Pub Date : 2024-10-01 DOI:10.1016/j.combustflame.2024.113780

Adam Kotler , Anthony Morales , Sheikh Salauddin , Daniel Rosato , Mason Thornton , Hardeo M. Chin , Zachary White , Kareem Ahmed

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Abstract

A standing normal detonation mode of combustion consisting of a normal shock coupled with heat release is realized in an experimental high-speed reacting-flow facility. The normal detonation is stabilized using a 2D ramp where the high-enthalpy freestream Mach number and reactant composition is equivalently matched to the Chapman-Jouguet (CJ) consumption speed of the detonation, at M_∞/M_CJ = 1.06. High resolution optical measurements of OH* chemiluminescence and density gradients from schlieren clearly show the close-coupling between the normal shock and the heat release of the standing detonation. A ZND analysis have been conducted using the boundary conditions where the induction length is found to closely matches the experimentally measured induction length. The agreement between the induction length scales and the freestream Mach number to detonation CJ Mach number confirm the realization of a standing detonation mode of combustion.

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实现用于高超音速推进的常态起爆

在实验性高速反应流设备中实现了由正常冲击和热释放组成的常态爆燃模式。正常爆燃通过二维斜坡来稳定，其中高焓自由流马赫数和反应物成分与爆燃的查普曼-朱盖特（CJ）消耗速度（M∞/MCJ = 1.06）等效匹配。OH* 化学发光的高分辨率光学测量和来自裂片的密度梯度清楚地表明了正常冲击与立爆热量释放之间的密切联系。利用边界条件进行了 ZND 分析，发现感应长度与实验测量的感应长度非常接近。感应长度尺度与自由流马赫数到起爆 CJ 马赫数之间的一致性证实了驻留起爆燃烧模式的实现。

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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.