【摘 要】
：
The PDRE test model used in these experiments utilized kerosene as the fuel, oxygen as oxidizer, and nitrogen as purge gas. The solenoid valves were employed to
【机 构】
：
School of Engine and Energy
【基金项目】
：
国家自然科学基金;教育部高校新世纪杰出人才项目
论文部分内容阅读
The PDRE test model used in these experiments utilized kerosene as the fuel, oxygen as oxidizer, and nitrogen as purge gas. The solenoid valves were employed to control intermittent supplies of kerosene, oxygen and purge gas. PDRE test model was 50 mm in inner diameter by 1.2 m long. The DDT (defiagration to detonation transition) enhancement device Shchelkin spiral was used in the test model.The effects of detonation frequency on its time-averaged thrust and specific impulse were experimentally investigated. The obtained results showes that the time-averaged thrust of PDRE test model was approximately proportional to the detonation frequency. For the detonation frequency 20 Hz, the time-averaged thrust was around 107 N, and the specific impulse was around 125 s. The nozzle experiments were conducted using PDRE test model with three traditional nozzles. The experimental results obtained demonstrated that all of those nozzles could augment the thrust and specific impulse. Among those three nozzles, the convergent nozzle had the largest increased augmentation, which was approximately 18%, under the specific condition of the experiment.
其他文献
Brassinosteroids (BRs) are a group of naturally-occurring steroidal phytohormones playing fundamental roles during normal plant growth and development.Using a c
作者考虑颤动的准确可控制性一 thins 使神圣壳，厚度，有控制的 2 ε在侧面的表面上并且在壳的顶和底部强加了。除了证明准确控制的存在，当壳的厚度去零，三个维的准确可控制性问题
The Main Optical Telescope (MOT) is an important payload of the Space Solar Telescope (SST) with various instruments and observation modes. Its real-time data h
Paddy fields in mining areas are usually co-contaminated by a cocktail of mixed toxic heavy metals (e.g.,Cd and Pb in Pb/Zn mines).However,previous studies on r
The main goal of flight clearance is to use the structured singular value (μ) analysis of the flight control system when some parameters in the system vary in
Aerospace relay is one kind of electronic components which is used widely in national defense system and aerospace system. The existence of remainder particles
When the stagnation temperature of a perfect gas increases, the specific heat ratio does not remain constant any more, and start to vary with this temperature.
季节性干旱是影响湖南春玉米生产最突出的气象灾害,分析其时空分布特征和发生的规律,可为湖南春玉米生产的发展和合理布局提供技术支持。该文基于湖南省96个气象站点1961-200
Two-layer flow of magnetic fluid and non-magnetic silicone oil was simulated numerically. The continuity equation, momentum equations,kinematic equation, and ma
To solve the topology optimization of complicated multi-objective continuous/discrete design variables in aircraft structure design, a Parallel Pareto Genetic A