On the performance of a cascade of improved turbine nozzle blades in nucleating steam. Part 1: Surface pressure distributions

Autor:	Z A Mamat, F Bakhtar, O C Jadayel, Mohammad Reza Mahpeykar
Rok vydání:	2009
Předmět:	Engineering Turbine blade business.industry Mechanical Engineering Nozzle Mechanical engineering Surface pressure Turbine law.invention Cascade law Steam turbine Two-phase flow business
Zdroj:	Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. 223:1903-1914
ISSN:	2041-2983 0954-4062
DOI:	10.1243/09544062jmes1255
Popis:	This article is the first of a set and describes the results of surface pressure measurements and flow visualizations in a cascade of improved steam turbine nozzle blade profiles. In the course of expansion of steam in turbines, the state path crosses the saturation line and the fluid nucleates to become a two-phase mixture. Formation and subsequent behaviour of the liquid lowers the performance of turbine wet stages. Turbine two-phase flow conditions can be reproduced satisfactorily under blow-down conditions for systematic study. Following earlier studies of some typical profiles the performance of a new design of blades is presented. A substantially improved aerodynamic performance has been achieved by the new profile.
Databáze:	OpenAIRE
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