模型参数对水下两相冲压式发动机内推力影响的数值模拟研究  

Numerical study of structure parameters effect on inner thrust of underwater two-phase ramjet

作　　者：张嘉钟[1] 董磊[1] 曹伟[1] 刑彦江[1] 王柏秋[1] 

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《舰船科学技术》2010年第9期39-43,共5页Ship Science and Technology

摘　　要：基于均质平衡流理论,考虑两相混合物的速度滑移,对水下两相冲压式发动机内流场进行了数值模拟,分析了水下两相冲压式发动机的内部结构参数变化对水下两相冲压式发动机内推力的影响。在给定来流速度条件下,发动机内推力随着进水道入口截面直径减小而增大,但是增幅减小,内推力随通气量的变化趋势没有改变;内推力和使内推力达到最大值的通气量最佳值随着进水道出口截面直径增大而增大;内推力随着喷管出口截面直径增大而增大,而通气量最佳值则减小;单独改变发动机进水道、混合室和喷管的长度以及混合室出口截面直径对发动机内推力的数值和变化趋势没有显著影响。Based on the homogeneous balance flow theory,the inner flow field of the underwater two-phase ramjet is investigated numerically in this paper,and the velocity slip between the air and the water is taken into account.The effect of the structure parameters on the inner thrust of the ramjet is studied.When the diameter of the inlet of water-inlet decreases,the inner thrust increases,but the increase amplitude of inner thrust decrease and the changing tend of inner thrust does not change,at given velocity of water.Both the inner thrust and the optimum value of the gaseous mass flow rate where the inner thrust reaches maximum value increase,as the diameter of the outlet of water-inlet.When the outlet of the nozzle increases,the inner thrust increases,but the optimum value decreases.The variation of the length of water-inlet,mixing chamber,and nozzle,and the diameter of the outlet of mixing chamber hasn＇t obvious effect on the value and the changing tend of inner thrust of ramjet.

关 键 词：气-水两相流 水下两相冲压式发动机 CFD 内推力 结构参数 

分 类 号：U664.34[交通运输工程—船舶及航道工程]