AN INVESTIGATION OF CONDENSING STEAM FLOW IN A TURBINE CASCADE WITH INJECTION OF WATER DROPLETS AT INLET

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TEYMOURTASH A.R.; MAHPAKER M.R.; LAKZIAN E.

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Paper Information

Journal: JOURNAL OF MECHANICAL ENGINEERING AMIRKABIR (AMIRKABIR) Year:2011 | Volume:43 | Issue:1 Page(s): 71-83

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Title

AN INVESTIGATION OF CONDENSING STEAM FLOW IN A TURBINE CASCADE WITH INJECTION OF WATER DROPLETS AT INLET

Author(s)

TEYMOURTASH A.R. | MAHPAKER M.R. | LAKZIAN E. | Issue Writer Certificate

Keywords

SUPERCOOLEDQ3

NUCLEATIONQ3

CONDENSATION SHOCKQ3

WET STEAMQ3

JAMESONQ3

BALDWIN-LOMAXQ3

INJECTION OF DROPLETSQ3

Abstract

During the course of expansion of steam in a Laval nozzle and a cascade of turbine, the state path crosses the saturation line; the steam first supercools and then reverts to equilibrium through the spontaneous formation of droplets or CONDENSATION SHOCK, which causes aerodynamics and thermodynamics losses. In this way by formation of droplets and so reducing Gibbs energy, equilibrium is reached. This paper describes a two-phase model and provides an approach for including spontaneous homogeneous NUCLEATION. In order to solve conservation equations, coupled with the equations of formation and growth of the droplets, a 2-D time-marching solution scheme with BALDWIN-LOMAX turbulence model, was used in this study. Pressure distribution and droplets size in a Laval nozzle and a turbine cascade are predicted and compared with empirical results. In the strength of validation, the effect of injection of water droplets into the steam flow in order to control the intensity and location of CONDENSATION SHOCK is considered theoretically. A converging nozzle is used to producing droplets at inlet of turbine cascade. The results illustrate that WET STEAM at inlet of a turbine cascade weakens or delays the CONDENSATION SHOCK in the passage of the blades.

Cites

EFFECT OF THE DROPLET SURFACE TENSION CORRECTION ON NUCLEATION CONDENSING WATER VAPOR FLOW

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APA: Copy

TEYMOURTASH, A.R., MAHPAKER, M.R., & LAKZIAN, E.. (2011). AN INVESTIGATION OF CONDENSING STEAM FLOW IN A TURBINE CASCADE WITH INJECTION OF WATER DROPLETS AT INLET. JOURNAL OF MECHANICAL ENGINEERING AMIRKABIR (AMIRKABIR), 43(1), 71-83. SID. https://sid.ir/paper/165948/en

Vancouver: Copy

TEYMOURTASH A.R., MAHPAKER M.R., LAKZIAN E.. AN INVESTIGATION OF CONDENSING STEAM FLOW IN A TURBINE CASCADE WITH INJECTION OF WATER DROPLETS AT INLET. JOURNAL OF MECHANICAL ENGINEERING AMIRKABIR (AMIRKABIR)[Internet]. 2011;43(1):71-83. Available from: https://sid.ir/paper/165948/en

IEEE: Copy

A.R. TEYMOURTASH, M.R. MAHPAKER, and E. LAKZIAN, “AN INVESTIGATION OF CONDENSING STEAM FLOW IN A TURBINE CASCADE WITH INJECTION OF WATER DROPLETS AT INLET,” JOURNAL OF MECHANICAL ENGINEERING AMIRKABIR (AMIRKABIR), vol. 43, no. 1, pp. 71–83, 2011, [Online]. Available: https://sid.ir/paper/165948/en

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