CAJ | 학술논문

内燃机缸内湍流的研究是个十分重要而且复杂的课题,数值模拟技术为其提供了有效的研究方法.本文利用CFD软件KIVA分别采用标准k-ε,RNGk-ε模型在无旋流和有旋流的两种工况下,对轴对称的ω型燃烧室内的湍流流动进行二维和三维数值模拟计算,并把计算结果与实验数据进行对比,得到了内燃机缸内湍流流动的特性.本文为内燃机港内湍流研究提供了一种比较好的研究方法,此方法和计算结果为内燃机的性能开发与优化设计提供依据.
내연궤항내단류적연구시개십분중요이차복잡적과제,수치모의기술위기제공료유효적연구방법.본문이용CFD연건KIVA분별채용표준k-ε,RNGk-ε모형재무선류화유선류적량충공황하,대축대칭적ω형연소실내적단류류동진행이유화삼유수치모의계산,병파계산결과여실험수거진행대비,득도료내연궤항내단류류동적특성.본문위내연궤항내단류연구제공료일충비교호적연구방법,차방법화계산결과위내연궤적성능개발여우화설계제공의거.
Turbulent flows in the cylinder of internal combustion engines are invariably complicated. Numerical sim- ulation is a good way to solve the problem. This thesis performs comparative study on three versions of eddy - viscos- ity models （EVM）, i. e. conventional k - e model, RNG k - e model. 2 - D and 3 - D numerical computations are carried out for o0 combustion chamber. The effects of swirling and curvature are taken into account. The text com- pares the result with the experimental data and obtains the character of turbulent flows of internal combustion en- gines. This thesis provides a well method to study turbulent. The result and method provides the laws of diesel en- gine development and optimum design.