摘要
在前人建立的循环模型基础上,引入了非理想气体比热模型,研究了内可逆和不可逆Atkinson循环的最优性能,分析了压缩比(γ)、循环最高温度(T3)、气缸活塞长度(L)、比热模型、传热损失(B)、摩擦损失和内不可逆性损失对两种循环功率(P)、效率(η)、生态学函数(E)和功率密度(Pd)的影响.结果表明:曲线P-γ、η-γ、E-y和Pd-γ均呈类抛物线型,均存在对应的最佳γ让4个目标函数分别达到最大.对内可逆循环,随着T3的增大,Pmax、ηmax、Emax和(Pd)max均增大;随着B的增大,ηmax和Emax均减小.对不可逆循环,随着不可逆损失项数目的增多,Pmax、ηmax、Emax和(Pd)max均减小;随着T3的增大,Pmax、ηmax、Emax和(Pd)max均增大;随着L的增大,Pmax、ηmax、Emax和(Pd)max均减小.与其他两种比热模型相比,非理想气体比热模型下的两种循环Pmax、ηmax、Emax和(Pd)max均较小.
Abstract
Based on the models established in previous literature,it further considers the non-ideal gas specific heat model,studies the optimal performances of endoreverisble and irreversible Atkinson cycles,and analyzes the effects of compression ratio(y),the maximum cycle temperature(T3),cylinder piston length(L),specific heat model,heat transfer loss(B),friction loss and internal irreversible loss on cycle power(P),efficiency(η),ecological function(E)and power density(Pd).The results show that curves P-γ,η-γ,E-γ and Pd-γ are all parabolic.There are optimal ys to maximize the four objective functions,respectively.For endoreversible cycle,with the increase of T3,the Pmax,ηmax,Emax and(Pd)max all increase;with the increase of B,the ηmax and Emax all decrease.For irreversible cycle,with the increases of the number of irreversible loss items,the Pmax,ηmax,Emax and(Pd)max all decrease;with the increase of T3,the Pmax,ηmax,Emax and(Pd)max all increase;with the increase of L,the Pmax,ηmax,Emu and(Pd)max all decrease.Comparing with the other two specific heat models,the Pmax,ηmax,Emax and(Pd)max of the two cycles with the non-ideal gas specific heat model are smaller.
基金项目
国家自然科学基金(52171317)
国家自然科学基金(51779262)
武汉工程大学研究生教育创新基金(CX2022072)
维普
万方数据