1螺旋进气道结构参数对气道流通特性的影响.pdfVIP

29 3 Vo l. 29 No . 3 2008 6 Chinese Internal Combu stion Eng ine Eng ineering Jun . 200 8 : 1000- 0925 2008) 03- 025- 04 290042 1, 2 2 1 2 3 3 , , , , , 1. , 300072; 2 . ; 3. ) Infl ence of the Str ct re Parameters of Helical Inlet D ct on Inlet D ct Flow Characteristic 1,2 2 1 2 SI Peng-k n , HOU Sh-mei , ZHANG H -i ming , ZHANG Zhen-zhong , 3 3 YANG Zh-i yong , ZHANG Z-i li 1. St at e Key L abo rato ry of Eng ines, T ianjin Universit y, T ianjin 300072, China; 2. Cheng de P et ro leum College; 3. Dongf eng N anchong A ut omo bile Co. , L t d. ) Abstract: In t his paper, w e first analyz ed and selcet ed the ev aluat io n parameters of int ake po rt f low charact er ist ic, and det ermined t he helical int ake port st ructure paramet er s inf luencing f low charact erist ic o f model N Q 140N CN G engine modified by diesel engine. T he inf luences of each str uct ure parameter on t he flo w charact erist ic w ere t ested separat ely . T he exper im ent al results indicat e t he inf luence of each st ruct ur e paramet er on f low charact er ist ic is not m onot onic. F inally , a t est method for o bt aining a f low charact erist ic paramet er w as put f orw ard. In t his paper, a new analysis met ho d based on a large number of t est dat a w as present ed , w hich m ade t he analysis of inf luence o f int ake port st ruct ur e paramet er on t he flo w charact erist ic easier .