Author:
Yang Dengfeng,Wang Kai,Wang Huaiyu,Zhang Qian,Lei Xinguo,Hu Leon
Abstract
In order to effectively weaken the leakage flow and shock intensity of traditional “swing” type guide vanes in a variable nozzle turbine, a new flow control device named the “split sliding guide vane” (SSGV) is studied in the present work. Steady and unsteady calculations were carried out on both the SSGV and base model at 10%, 40%, and 100% open positions. The shock test was performed to verify the accuracy of the numerical method. The results showed that at 10%, 40%, and 100% open positions, the leakage flow of the SSGV was 43%, 51%, and 40% of that of the base model, respectively. When 10% open, the turbine efficiency increased by 12%, compared with the base model, since the SSGV could effectively inhibit the clearance leakage flow. Due to the increased distance between the rotor and guide vane, the shock intensity of the SSGV was only 52% of that of the base model when 40% was open. The SSGV could reduce the static pressure loss on the guide vane pressure surface, but for the guide vane suction surface, the static pressure distribution appeared in a “W” shape due to the influence of the vane profile. Finally, the flow in the rotor was studied, which showed that the weakening of the shock and reduction of the clearance leakage flow in the guide vane were also beneficial for the strength of downstream rotor blades.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Hebei Province
Central University Basic Scientific Research Business Fee Funding Project
Subject
Electrical and Electronic Engineering,Industrial and Manufacturing Engineering,Control and Optimization,Mechanical Engineering,Computer Science (miscellaneous),Control and Systems Engineering
Reference33 articles.
1. Health effects of diesel exhaust emissions-a mixture of air pollutants of worldwide concern;Toxicology,2002
2. Shi, M., Wang, H., Yang, C., Wang, Y., and Niu, X. (2022). Experimental Research on the Matching Characteristics of the Compound VGT-STC System with a V-Type Diesel Engine. Machines, 10.
3. (2022). Effect of Nozzle Vane and Rotor Clearance on Performance of Variable Nozzle Turbine. J. Therm. Sci., 31, 1745–1758.
4. Understanding of the interaction between tip leakage flow and main passage flow in a VGT turbine;Adv. Mech. Eng.,2015
5. Viskup, R., Alberer, D., Oppenauer, K., and del Re, L. (2011). Measurement of Transient PM Emissions in Diesel Engine, SAE. SAE Technical Paper.
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献