Study on concentration distribution and detonation characteristics of typical multiphase fuel in orthogonal flow field

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2024-10-31 DOI:10.1016/j.ast.2024.109704

Linghui Zeng , Zhongqi Wang , Jianping Li , Xing Chen

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Abstract

The fuel concentration distribution and detonation characteristics are important for performance evaluation. In order to meet the needs of airdrop, launcher and missile, the transient flow and detonation process of multiphase fuel in orthogonal flow field are analyzed by experiments and numerical simulations. The dynamic detonation model of ethyl ether (EE), propylene oxide (PO) and tetrahydro dicyclopentadiene (JP-10) is built. The flow process, concentration distribution, overpressure, temperature and detonation wave structure of the three fuels are obtained. The results show that the falling velocity has obvious influence on the detonation process of fuel droplets. The falling velocity of 0.5 Ma makes the fuel concentration distribution more uniform and the energy output is better. The peak overpressure of EE, PO and JP-10 is 2.88 MPa, 3.21 MPa and 2.96 MPa respectively. The peak temperature is 2885 K, 3230 K and 2955 K respectively. The burn out rate increases by 8.5%, 8.1% and 13.7% respectively. JP-10 has higher sensitivity to falling velocity, and there are obvious secondary peaks of overpressure in low-speed state. PO has higher stability for falling velocity, and the scaled length of high temperature/pressure after detonation wave is 0.145 m·kg^-1/3.

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正交流场中典型多相燃料的浓度分布和爆炸特性研究

燃料浓度分布和爆炸特性对性能评估非常重要。为了满足空投、发射和导弹的需要，通过实验和数值模拟分析了多相燃料在正交流场中的瞬态流动和起爆过程。建立了乙醚（EE）、环氧丙烷（PO）和四氢双环戊二烯（JP-10）的动态引爆模型。得到了三种燃料的流动过程、浓度分布、过压、温度和爆轰波结构。结果表明，下落速度对燃料液滴的起爆过程有明显影响。0.5 Ma 的下降速度使燃料浓度分布更均匀，能量输出更好。EE、PO 和 JP-10 的峰值超压分别为 2.88 MPa、3.21 MPa 和 2.96 MPa。峰值温度分别为 2885 K、3230 K 和 2955 K。烧损率分别增加了 8.5%、8.1% 和 13.7%。JP-10 对下降速度的敏感性较高，在低速状态下有明显的次生超压峰。PO 对下降速度的稳定性较高，爆炸后高温/高压波的比例长度为 0.145 m-kg-1/3。

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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.