气波增压柴油机进气管设计与试验研究

基于SOFIM涡轮增压中冷柴油机的进气管,设计SOFIM气波增压柴油机的进气管,利用正交设计优化试验进气管的结构组合,基于三维设计软件UG对这些试验管进行几何建模及结构分析,找出质量最轻、内腔容积最大的进气管,然后再基于ANSYS对这些试验管进行流动分析,找出进气量最大的进气管,综合结构和流动优化结果,确定最终的气波增压柴油机(PWSD)进气管.然后,采用制成的该管模型,在气道实验台上进行流动实验,结果表明,该管比原管进气量平均提高近7%.最后,采用铝合金铸造出该管,进行台架实验,结果表明,中、低转速下,进气量平均提高近6.54%;中、高转速下,进气量平均提高近4.65%.

DESIGN OF INTAKE MANIFOLD AND EXPERIMENTAL STUDY FOR PRESSURE WAVE SUPERCHARGED DIESEL ENGINES

A SOFIM turbo-charged diesel intake manifold was taken as the reference in the design of pressure wave supercharged diesel intake manifolds. Orthogonal experimental design method was employed to determine the grouping of test intake pipes. Using 3-D UG Graphics, the geometric modeling and structural analysis for these pipes were performed to find the intake pipe with the least mass and largest inner volume. Based on ANSYS, flow characteristics analysis for the manifold was then done to find the pipe with the largest average flow rate. Following the structural and flow analysis the final optimized intake manifold was determined for the PWS diesel. The new prototype and the original manifold were compared on the flow bench. The test results show that the new pipe induced nearly 7% more air than the original design. Finally the manifold cast in aluminium alloy was compared with the original on the engine test bed. Test results show that the pipe induced nearly 6.54% more air than the original at medium-low speeds and 4.65% at medium-high speeds.