一、前言通流部分几何尺寸已定的柴油机与所选增压器能较佳匹配应实现下列三条要求:1.正确找出柴油机在设计点时增压系统和燃烧系统较佳匹配所需最小而又必要的耗气率 g_L。经验指出:g_L 过低有损燃烧品质,热负荷剧增;g_L 过高将不必要地消耗废气能量;两者都将导致耗油率 g_e 的上升。 I. Introduction Flow through the geometry of the fixed part of the selected turbocharger and the selected better match should achieve the following three requirements: 1. To correctly identify the diesel engine at the design point of the turbocharged system and the combustion system to match the minimum While the necessary gas consumption g_L. Experience shows that: g_L is too low to impair the combustion quality and the heat load increases sharply; if g_L is too high, the exhaust energy will be consumed unnecessarily; both will lead to the increase of fuel consumption g_e.