农机化研究Issue(3)：224-228,5.
四气门柴油机进气道稳流试验研究及数值模拟
Steady Flow Test and Numerical Simulation of Air Flow in Intake Ports for 4-Valve Diesel Engine
摘要
Abstract
This paper have done steady flow test of single helical , tangent and double ports in a 4-valve diesel engine for measuring the flow coefficient and swirl ratio .The 3 D numerical simulation of the steady flow in the previous three ports under the condition of steady testing by means of software FIRE of CFD , which calculate the flow coefficient and swirl ra-tio in 2-10 mm valve lift .It shows that the results of steady-state simulation are in good agreement with its test results , and the deviations are within 5%, when the results of simulation compared with test results , which verify the feasibility of the numerical simulation .After analysing in-cylinder flow velocity field and turbulent kinetic energy contour field , the re-sults point that come the swirl flow characteristics of the three ports In double ports , there is a certain loss of flow in the interference of the double gas flow , where exists backflow phenomenon .关键词
柴油机/稳态试验/流量系数/涡流比Key words
diesel engine/steady flow test/flow coefficient/swirl ratio分类
能源科技引用本文复制引用
廖礼平,姜水生..四气门柴油机进气道稳流试验研究及数值模拟[J].农机化研究,2014,(3):224-228,5.基金项目
国家自然科学基金项目 （）
