超燃用煤油燃烧加热器设计方法研究

【作者】 钟梓鹏；

【导师】 乐嘉陵；

【作者基本信息】 西北工业大学 ， 航空宇航推进理论与工程， 2005， 硕士

【摘要】 本文根据超音速燃烧冲压发动机的地面实验要求,设计了用于超燃地面实验的煤油燃烧加热器,研究了煤油燃烧加热器的设计方法。加热器设计要求:进口流量0.8～1.2kg/s,耐压不低于20atm,出口总压大于10atm,出口总温在1400～1800K范围内可调,升温时间小于5秒。 本文完成了加热器总体尺寸设计,火焰筒壁冷却方案设计,加热器外壳强度校核和补氧设计。采用两种一维算法确定了火焰筒空气流量分配规律,计算表明采用简化的一维算法能满足工程设计的需要。采用FLUENT软件模拟加热器掺混段三维流场,结果表明加热器出口流场达到设计要求。比较采用三维数值模拟和简化一维算法得到的掺混段沿流程参数分布,两者吻合较好,表明一维设计方法满足工程设计的需要。经过验证,本文所设计的加热器满足所有设计要求。研究表明,本文所提出的设计方法具有一定的适用性和工程实用价值。更多还原

【Abstract】 According to the ground test requirement of scramjet. kerosene heater is designed which is applicable for scramjet test. The design method of kerosene heater is also researched. The objective of designing heater is: mass How m-0.8~1.2kg/s, sustained pressure P=20atm, exit total pressure P*>10atm, exit total temperature T* = 1400~1800K, the rising time of temperature t<5s.The design of geometry size, the scheme design of flametube cooling,structure intensity check of shell and the design of adding oxygen are finished.Two kinds of one-dimensional design method arc used to calculate the mass How distribution of the flametube. The computational results show that the simply one-dimensional design method agrees well with the engineering design requirement. The three-dimensional exit flow field of heater mixing duct is simulated by CFD method. The simulating results indicate that the exit flow field of hrater is uniform. The results of three- dimensional numerical simulation method is compared with that of one-dimensional simply method. The compared results indicate that simply one-dimensional design method is applicable for the design of kerosene heater. The designed heater agrees with design objective. The proposed design method in thesis is valuable for kerosene heater design.更多还原