科研之友
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摘要
Hydrogen is a widely used rocket fuel and methane is particularly of interest in Europe as a promising substitute for H-2, Experimental investigation of cryogenic reactive coaxial sprays with oxygen as an oxidizer and hydrogen and methane as fuels is conducted to prove whether concepts from the LOX/H-2 injector design can be transferred to LOX/CH4 injection. The liquid oxygen has been atomized in shear coaxial atomizers, and the sprays and flames have been investigated by visualization methods such as shadowgraphy and imaging of the flame emission. LOX sprays are characterized for both propellants by the intact core lengths and droplet numbers, and the combustion is analyzed in terms of the flame anchoring mechanism and the flame spreading angle. The results for LOX/H-2-and LOX/CH4-spray combustion are compared, and the influence of the injection conditions of the propellants on atomization and spray flame is discussed. Significant differences of the sprays and flames have been observed for the two propellant combinations at similar injection conditions, as defined by the Weber number and the momentum flux ratio. The flame stabilization process has shown a strong influence on the atomization and flame characteristics.
- 出版日期2007-8
- 单位西北工业大学
