求取发动机气缸内湍流参数的不同数据处理方法的研究  

THE STUDY ON DIFFERENT DATA PROCESSING METHODS FOR IN CYLINDER TURBULENCE PARAMETERS

作　　者：杨迪[1] 李国伟[1] 蒋德明[1] 沈惠贤[1] 

机构地区：[1]西安交通大学

出　　处：《西安交通大学学报》1996年第12期67-71,81,共6页Journal of Xi'an Jiaotong University

摘　　要：应用３种湍流参数计算方法（移动时窗法、傅里叶反变换法、时间平均滤波方法）对倒拖工况下ＴＹ１１００发动机缸内湍流参数进行了计算．通过计算自相关系数、标准一维能谱密度、Ｔａｙｌｏｒ微分时间尺度，对３种数据处理方法进行了比较，并研究了平均“时窗”宽度、相关窗宽度对计算结果的影响．结果表明，３种方法得到的结论基本上是一致的，平均“时窗”宽度、相关窗宽度在一定范围内的变动对计算结果影响很小．Three data processing methods for turbulence parameters moving time window, inverse Fourier transform, time average filter have been applied to the calculations of in cylinder turbulence parameters for a TY1100 engine under motored condition. The comparison among the three methods has been carried out by means of autocorrelation coefficient, one dimensional normalized spectral density and Taylor micro time scale. The influence of “time window” width and correlation length has also been investigated. The results show that three methods lead to similar conclusions and the variations in “time window” width and correlation length in a certain range make no significant difference.

关 键 词：内燃机 湍流 数据处理 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]