A numerical study of the effect of roughness on the turbine blade cascade performance

Singh, Harkiran; Rai, Lajpat; Kale, S.R.

doi:10.1504/pcfd.2008.021320

Cited by 3 publications

(2 citation statements)

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“…2(b). In a study by Singh et al [30] using FLUENT computational fluid dynamics software with the same profile, the value of pressure coefficients over the smooth blade surface was found…”

Section: Resultsmentioning

confidence: 96%

Comparison between loss coefficients of smooth, smooth-thickened, and rough-thickened axial turbine blades

Samsher

2007

Proceedings of the Institution of Mechanical Engineers, Part A:

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Experiments have been performed in a six-blade-cascade with smooth, smooth-thickened, and rough-thickened blades. After performing experiments with smooth blades, plastic sheet for smooth-thickened and 50-grade emery paper for rough thickened (both of same thickness) are pasted on suction, pressure surface separately and over both surfaces together to study the effects of roughness caused by erosion and deposition over the turbine blades. Static and total pressures at cascade inlet, static pressure over the suction and pressure surfaces of the blades forming middle channel, total and static pressures and outlet flow angle at 15 per cent of chord downstream are measured at midspan height. Difference in loss coefficients with smooth-thickened and rough-thickened represents the effect of roughness without thickening, similar to the roughness generated by erosion. The results of rough-thickened blade can be used to simulate the effect of roughness generated by deposition. For the same roughness level, roughness caused by deposition is more detrimental than that by erosion. It is also observed that the performance deterioration and non-uniformity of flow at cascade exit is more for rough-thickened blades.

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“…2(b). In a study by Singh et al [30] using FLUENT computational fluid dynamics software with the same profile, the value of pressure coefficients over the smooth blade surface was found…”

Section: Resultsmentioning

confidence: 96%

Comparison between loss coefficients of smooth, smooth-thickened, and rough-thickened axial turbine blades

Samsher

2007

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

show abstract

“…Harkiran Singh et al [2], they studied a theoretical and numerical study to determine the effect of the roughness of the surface greater than 100 micron of the turbine blades that placed linearly at 100 microns. It was observed that the effect of roughness on the efficiency of the blade is evident at its upper surface compared to its lower surface.…”

Section: Corrosion or Erosion Of Bladesmentioning

confidence: 99%

An Effect of Turbine Blades Surfaces Roughness on Gas Power Plants and Performance Degradation

khudair¹,

Tjprc²

2019

IJMPERD

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The fuel contaminations and impurities leads to an extensive effects on the axial flow turbine for gas turbine engine of Iraq power plants, such as water content, Sulphur, sodium cause corrosion, erosion, and fouling which is the adherence of particles and droplets to the surface of turbine, i.e. (blade surface roughness) then turbulent boundary layer and its energy will increase. The gas station 35 MW was selected to determine the impact of this phenomenon on the performance of the station. Boundary layer separation take place early, flow deflection angle and blade efficiency were reduced, while the pressure loss coefficient and drag are increased. Turbine blade does not only reduce the aerodynamic performance, but the reduction in cross-sectional area of the turbine blade could lead to serious turbine damage. In this study, the relation between clean and rough turbine cascade will investigate to obtain aerodynamic behavior of both blades. A numerical solution (ANSYS Software) will use to simulate the test rig to predict the cascade blade performance and the upstream flow field, in order to achieve the main goals mentioned above. All the aerodynamic variables and parameters pressure and velocity distribution, energy dissipation, have calculated in the program energy dissipation were also calculated using numerical solution ANSYS software at wind tunnel Reynolds

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Study on the Modeling Method and Influencing Parameters of Sandblasting Process for Blade Grinding

Xiangyong

Wei

Huang

et al. 2022

Advances in Materials Science and Engineering

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Grinding the surface of wind turbine blades is one of the key production processes before its service. In order to solve the problem of high labor cost and low precision in manual grinding wheel grinding of wind turbine blades, the sandblasting process for blade grinding is proposed. The best parameters of sandblasting process applied to wind turbine blades are investigated by simulation. In this study, the simulation model of sandblasting process is established, and the fluid analysis of blades’ grinding using sandblasting process is carried out with the variables of blasting pressure, abrasive diameter, and blast distance. Simulation results show that the best parameters are 0.7 MPa for blasting pressure, 500 mm for spraying distance, and 0.4 mm for abrasive diameter. Finally, the tensile test is carried out on the samples’ grind by the traditional grinding process and sandblasting process. The results show that the paint surface grind by sandblasting process can bear a higher load. This study proves the feasibility of the sandblasting process in the composite materials’ grinding of wind turbine blades.

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A numerical study of the effect of roughness on the turbine blade cascade performance

Cited by 3 publications

References 0 publications

Comparison between loss coefficients of smooth, smooth-thickened, and rough-thickened axial turbine blades

Comparison between loss coefficients of smooth, smooth-thickened, and rough-thickened axial turbine blades

An Effect of Turbine Blades Surfaces Roughness on Gas Power Plants and Performance Degradation

Study on the Modeling Method and Influencing Parameters of Sandblasting Process for Blade Grinding

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