TY - JOUR
T1 - Elbow flow analysis and optimal exhaust port profile design
AU - Xu, Yang
AU - Huang, Shuhe
AU - Su, Liwang
AU - Zhang, Xiangyu
AU - Li, Yikai
N1 - Publisher Copyright:
© 2022, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2022/3
Y1 - 2022/3
N2 - In this study, the exhaust port profile of a diesel engine was numerically analyzed and optimized. First, the elbow profile results show that the separation loss of lower profile plays the main role in overall separation loss, it decreases sharply and then slowly with an increase of rlower/d. Within the range of 0 ≤ rlower/d ≤ 5, the total secondary flow loss increases sharply and then slowly with an increase of rlower/d. Under the same condition of relative pressure difference and lower profile, the elbow discharge coefficient increases with an increase of dmid/rupper and remains almost constant when dmid/rupper > 1. The maximum discharge coefficient under a certain rlower condition increases with an increase of rlower. Afterwards, the applicability of elbow profile results to exhaust port were verified and an exhaust port profile design method was established based on a circular arc profile. Finally the feasibility of exhaust port profile design method was verified experimentally.
AB - In this study, the exhaust port profile of a diesel engine was numerically analyzed and optimized. First, the elbow profile results show that the separation loss of lower profile plays the main role in overall separation loss, it decreases sharply and then slowly with an increase of rlower/d. Within the range of 0 ≤ rlower/d ≤ 5, the total secondary flow loss increases sharply and then slowly with an increase of rlower/d. Under the same condition of relative pressure difference and lower profile, the elbow discharge coefficient increases with an increase of dmid/rupper and remains almost constant when dmid/rupper > 1. The maximum discharge coefficient under a certain rlower condition increases with an increase of rlower. Afterwards, the applicability of elbow profile results to exhaust port were verified and an exhaust port profile design method was established based on a circular arc profile. Finally the feasibility of exhaust port profile design method was verified experimentally.
KW - CFD
KW - Design method
KW - Discharge coefficient
KW - Exhaust port profile
KW - Internal combustion engine
UR - http://www.scopus.com/inward/record.url?scp=85125621704&partnerID=8YFLogxK
U2 - 10.1007/s12206-022-0216-5
DO - 10.1007/s12206-022-0216-5
M3 - Article
AN - SCOPUS:85125621704
SN - 1738-494X
VL - 36
SP - 1251
EP - 1262
JO - Journal of Mechanical Science and Technology
JF - Journal of Mechanical Science and Technology
IS - 3
ER -