Numerical investigation of the pre-swirl rotor–stator system of the first stage in gas turbine

Liao, Gaoliang; Wang, Xinjun; Li, Jun

doi:10.1016/j.applthermaleng.2014.08.054

Cited by 23 publications

(8 citation statements)

References 31 publications

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“…Although there are copious turbulence models that researchers can choose from the commercial code CFX, the shear stress transport (SST) turbulence model is widely used, as it is the highest developed two equation eddy viscosity model implemented in CFX, and it combines the advantages of k-e and k-x turbulence model. In addition, many researchers [12,20,25] adopted SST turbulence model to investigate the flow and heat transfer characteristics of the pre-swirl rotor-stator cavities, and they found that the SST turbulence model can present a well prediction of measurements.…”

Section: Validation Of Turbulence Modelsmentioning

confidence: 99%

“…Later on, Javiya et al [11] conducted a comparison in heat transfer characteristics between computational fluid dynamics (CFD) results and experimental measurements, to assess the accuracy of CFD analysis for the prediction of heat transfer in a direct transfer pre-swirl system. Numerical investigations on the heat transfer characteristics of a pre-swirl system for the industrial gas turbine were conducted by Liao et al [12] and Zhang et al [13]. Luo et al [14][15][16] conducted experimental and numerical studies to investigate the flow and heat transfer characteristics of a rotor-stator cavity with an inlet at low radius and an outlet at high radius.…”

Section: Introductionmentioning

confidence: 99%

“…Didenko et al [18] performed a numerical study to investigate the effect of geometrical parameters in terms of the cavity width, pre-swirl nozzle location and way of air delivery on the adiabatic effectiveness, loss coefficient, and discharge coefficient. Liao et al [12] and Zhang et al [13,19] numerically studied the influences of geometrical parameters of nozzles on the adiabatic effectiveness and total pressure loss. Variations of radius ratio of pre-swirl nozzles to receiver holes, the preswirl cavity height and the pre-swirl cavity width were selected by Jarzombek et al [20] to investigate its' effects on the adiabatic effectiveness and total pressure loss.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation on the flow and heat transfer characteristics in radial pre-swirl system with different fillet radius at the junction of inlet cavity and nozzle

Zhang

Wang

2016

Applied Thermal Engineering

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Section: Validation Of Turbulence Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical investigation on the flow and heat transfer characteristics in radial pre-swirl system with different fillet radius at the junction of inlet cavity and nozzle

Zhang

Wang

2016

Applied Thermal Engineering

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“…The influence of rotating speed, mass flow rate, swirl ratio and pre-swirl nozzle number on the performance of pre-swirl system were carried out by Yan et al (2003). Liao et al (2014) presented numerical and experimental research on the influence of pre-swirl nozzle structure, pressure ratio and rotating speed on temperature reduction and total pressure drop. Wang et al (2007) presented the influence of the radial location of the pre-swirl nozzle on the temperature reduction and heat transfer on the rotor disk surface.…”

Section: Introductionmentioning

confidence: 99%

A Novel Design of Cooling Air Supply System with Dual Row Pre-Swirl Nozzles

2020

JAFM

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A novel design of cooling air supply system with dual row pre-swirl nozzles (DRPM) is promoted and investigated. Simplified theoretical analysis and numerical simulation are used to estimate the total temperature reduction and mass flow rate characteristic of DRPM and compared with single row pre-swirl nozzle model (SRPM). The results show that, both models have similar flow structure and the variation of total temperature reduction and dimensionless mass flow rate with rotational Reynolds number and pressure ratio is also similar. Which have an inflection point with the increase of rotational Reynolds number but increases monotonically with the variation of pressure ratio. The pre-swirl system has the maximum flow rate and temperature reduction when the inflow Angle equal to 0 or the swirl ratio equal to 1 at the inlet of the receiver hole. The increase in pressure ratio improves the total temperature reduction and dimensionless mass flow rate as well. In the range of rotational Reynolds number calculated, DRPM can increase the dimensionless mass flow rate by 3.0% but the total temperature reduction decreased by 37.8% in average compared with SRPM. On the other hand, the dimensionless mass flow rate increased by 2.8% and total temperature reduction decreased by 14.9% in average in the range of pressure ratio calculated. Numerical results are in good agreement with the results calculated by simplified theoretical formulas.

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“…Numerous research works have been conducted on pre-swirl flow [25][26][27]. A numerical study by Liao et al [28] has revealed that the pressure ratio has an important effect on the magnitude of heat transfer coefficient and the rotating speed has a significant effect on the displacement of locations with high heat transfer coefficient. By considering a center inflow in a pre-swirl rotorstator system, Zhang et al [29] investigated its effects on flow structure and heat transfer and presented a theoretical expression for adiabatic effectiveness with center flow.…”

mentioning

confidence: 99%

Numerical investigation of fluid flow in a rotor–stator cavity with curved rotor disk

Damavandi

Nejat

2018

J Braz. Soc. Mech. Sci. Eng.

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In this research, by presenting a new idea of creating a curved surface on rotor disk wall, its effects on flow structure and the performance parameters of rotor-stator cavity is investigated. The fluid enters the cavity axially through a hole provided at the center of the stator and eventually leaves the cavity radially through the clearance between the rotor and shroud. By varying the geometrical parameters of elliptical bumps on rotor disks, their effects on the flow structure and on the performance parameters of rotor-stator cavity are evaluated. The geometrical parameters of elliptical bumps include the semi major axis of elliptical bump (half of bump length), semi minor axis of elliptical bump (bump thickness), and the distance between the center of elliptical bump and the system's rotation axis. The governing equations for the steady, threedimensional, turbulent, and compressible flow, including the continuity, momentum, and energy equations, in the Cartesian coordinate system have been solved using a commercial finite-volume-based software (Ansys CFX). The numerical results have been validated by means of experimental results, and there has been a good match between the results obtained from the two methods. As the distance between the bump and rotation axis increases, more energy is imparted to the fluid and the total pressure at cavity outflow and the moment applied to rotor increase. Furthermore, the enlarging of bump's curvature leads to the increase of tangential flow velocity over the bump and the reduction of static pressure at the inlet. With the reduction of static pressure, the mass flow rate of fluid in the cavity increases.

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Numerical investigation of the pre-swirl rotor–stator system of the first stage in gas turbine

Cited by 23 publications

References 31 publications

Numerical investigation on the flow and heat transfer characteristics in radial pre-swirl system with different fillet radius at the junction of inlet cavity and nozzle

Numerical investigation on the flow and heat transfer characteristics in radial pre-swirl system with different fillet radius at the junction of inlet cavity and nozzle

A Novel Design of Cooling Air Supply System with Dual Row Pre-Swirl Nozzles

Numerical investigation of fluid flow in a rotor–stator cavity with curved rotor disk

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