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在稳流气道试验台上，模拟了ＹＣ６１０８柴油机进气道倾斜、纵向胀大等铸造偏差，利用Ｒｉｃａｒｄｏ和ＦＥＶ气道性能评价指标，研究铸造缺陷如何影响进气道的性能。试验结果表明：进气道入口处向上抬高，涡流强度减小，纵向胀大使进气道的流量系数和涡流比明显降低，而当进气道既倾斜又胀大时，将进一步恶化气道性能。
On the steady flow airway test rig, casting bias of YC6108 diesel engine intake slop and longitudinal expansion are simulated, and the influence of casting defects on inlet performance is studied by using Ricardo and FEV airway performance evaluation indexes. The results show that the inlet of the air intake rises upward, the eddy current intensity decreases, and the longitudinal expansion causes the air inlet flow coefficient and vortex ratio to decrease obviously. When the air inlet is inclined and swollen, the airway will further deteriorate performance.