CAJ | 학술논문

为研究不同工况下掺氢汽油机燃烧特性，构建并验证了用于计算掺氢汽油机缸内燃烧过程的准维模型。模型基于理想气体状态方程、质量守恒方程、热力学第一定律，建立双区热力学微分方程组，通过湍流卷吸模型确定燃烧放热率，通过掺氢汽油层流火焰速率关联式反映掺氢对混合气火焰特征的影响规律，并利用 MATLAB 数值分析软件完成方程组的求解过程。结合内燃机台架试验，对不同掺氢体积分数、混合气当量比、进气道压力条件下模型的准确性进行了验证。对比结果表明，该模型能准确地反映不同运行条件下掺氢汽油机的燃烧特性。
위연구불동공황하참경기유궤연소특성，구건병험증료용우계산참경기유궤항내연소과정적준유모형。모형기우이상기체상태방정、질량수항방정、열역학제일정률，건립쌍구열역학미분방정조，통과단류권흡모형학정연소방열솔，통과참경기유층류화염속솔관련식반영참경대혼합기화염특정적영향규률，병이용 MATLAB 수치분석연건완성방정조적구해과정。결합내연궤태가시험，대불동참경체적분수、혼합기당량비、진기도압력조건하모형적준학성진행료험증。대비결과표명，해모형능준학지반영불동운행조건하참경기유궤적연소특성。
To study the combustion performance of hydrogen-enriched gasoline engine under different operating conditions, a quasi-dimensional model for predicting the combustion behavior in hydrogen-enriched gasoline engines was developed and validated. In this model, the two-zone thermodynamic differential equations were established based on the ideal gas equations and conservation equations of mass and energy for the burnt and unburned zones, respectively. The heat release rate was determined by the turbulence entrainment model. The laminar flame speed correlation of hydrogen-gasoline blends was implemented in this model to characterize the variation of combustion properties after hydrogen addition. The numerical analysis code MATLAB was used to solve the differential equations. The predicting accuracy of the proposed model was evaluated through the comparison with experimental results under different hydrogen volume fractions, equivalence ratios, and manifolds absolute pressures. The comparison results confirm that the proposed model can capture the combustion behavior of the hydrogen-enriched gasoline engine for various operating conditions.