论文部分内容阅读
为获得具有优良的流通特性和涡流特性的四气门柴油机进气道系统 ,在稳流气道试验台上 ,研究了进气道的布置对四气门柴油机进气道流动特性的影响 .结果表明 ,气道布置角度的变化对流量系数影响不大 ,但对涡流比有较大影响 ;切向、螺旋气道布置角度的变化对组合涡流的影响分别表现在小升程范围和中、大升程范围 ,前者比后者有更大的影响 ;组合气道涡流较单独气道开启时有较大降低 ,螺旋气道的涡流降低幅度远大于切向气道
In order to obtain a four-valve diesel engine inlet system with excellent flow characteristics and eddy current characteristics, the effect of inlet arrangement on the inlet flow characteristics of a four-valve diesel engine was studied on a steady flow airway test rig.The results show that the gas The change of channel layout angle has little effect on the flow coefficient, but has a great influence on the eddy current ratio. The influence of the change of the tangential and spiral airway angles on the combined eddy current is manifested in the range of small lift, medium lift and large lift, respectively , The former has a greater impact than the latter; combined airway vortex than when the airway is opened significantly reduced, spiral airway vortex reduction is much larger than the tangential airway