Performance prediction of a mixed flow turbine

Autor:	Madjid Hachemi, Mohammed Kamel Hamidou, Mohammed Hamel, Sid Ali Litim, Miloud Abidat
Rok vydání:	2008
Předmět:	Engineering Turbine blade Isentropic process Rotor (electric) business.industry Mechanical Engineering Mechanical engineering Turbine Industrial and Manufacturing Engineering law.invention Draft tube law Performance prediction General Materials Science business Casing Turbocharger
Zdroj:	Mécanique & Industries. 9:71-79
ISSN:	1765-2960 1296-2139
DOI:	10.1051/meca:2008009
Popis:	Turbochargers are widely used in Diesel engines as a means of increasing the output power. Most of them are fitted with radial or mixed flow turbines. In applications where high boost pressure is required, radial turbines are replaced with mixed flow turbines with positive rotor inlet blade angle so that they can achieve a maximum efficiency at a lower value of blade speed to isentropic expansion velocity ratio than the usual 0.7 (for radial turbines). This study, performed with the ICEM and CFX softwares of ANSYS, presents a numerical performance prediction of a mixed flow turbine for a wide range of rotational speeds and pressure ratios. The influence of the clearance between the rotor tip blades and the casing on the turbine performances is also investigated. A simulation of the turbine under pulsed inlet flow conditions is also presented.
Databáze:	OpenAIRE
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