进气道性能随工作条件的变化规律，与理论分析一致。
Results indicate that the precondition method can capture shocks accurately, and inlet performance variations characteristics agree well with the theory results.
指出了CFD在评价柴油机螺旋进气道性能中的实用价值。
It shows the useful value of CFD to diesel helical intake port evaluation.
进气道性能(涡流强度、流量系数)对柴油机的动力性、经济性和排放有重要影响。
The intake port performance (swirl number, flow coefficient) has an important effect on power, economy and emissions of diesel engine.
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