Aerodynamic performance analysis of partial admission dual row control stage at different working conditions

Partial admission aerodynamic performance of a nozzle control stage for a 600MW steam turbine was numerically investigated using the Reynolds-Averaged Navier-Stokes (RANS) solutions. Two inlet main steam pipe, four control valves, four nozzle groups including strengthening ribs and full stator blades, and full rotor blades were considered in the present computational domain. The partial admission with three control vales opening and the fourth control valve closed under five different backing pressures were calculated to analyze the aerodynamic efficiency and total pressure losses distributions. The maximum aerodynamic efficiency of the nozzle control stage was obtained at five different backing pressure operating conditions. The flow fields in the nozzle control stage at specified backing pressure with consideration of the partial admissions effects were also illustrated.

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A torque matched aerodynamic performance analysis method for the horizontal axis wind turbines

Wind Energy ◽

10.1002/we.1664 ◽

2013 ◽

Vol 17 (11) ◽

pp. 1727-1736 ◽

Cited By ~ 4

Author(s):

Ali Al-Abadi ◽

Özgür Ertunç ◽

Horst Weber ◽

Antonio Delgado

Keyword(s):

Performance Analysis ◽

Wind Turbines ◽

Aerodynamic Performance ◽

Horizontal Axis ◽

Analysis Method ◽

Horizontal Axis Wind Turbines

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Performance Characterization of a Twin Scroll Volute for Turbocharging Applications

Volume 2B: Turbomachinery ◽

10.1115/gt2018-75522 ◽

2018 ◽

Author(s):

Carlo Cravero ◽

Mario La Rocca ◽

Andrea Ottonello

Keyword(s):

Experimental Data ◽

Scientific Literature ◽

Aerodynamic Performance ◽

Operating Conditions ◽

Automatic Design ◽

Cfd Model ◽

Radial Turbine ◽

Wide Range ◽

Partial Admission

The use of twin scroll volutes in radial turbine for turbocharging applications has several advantages over single passage volute related to the engine matching and to the overall compactness. Twin scroll volutes are of increasing interest in power unit development but the open scientific literature on their performance and modelling is still quite limited. In the present work the performance of a twin scroll volute for a turbocharger radial turbine are investigated in some detail in a wide range of operating conditions at both full and partial admission. A CFD model for the volute have been developed and preliminary validated against experimental data available for the radial turbine. Then the numerical model has been used to generate the database of solutions that have been investigated and used to extract the performance. Different parameters and indices are introduced to describe the volute aerodynamic performance in the wide range of operating conditions chosen. The above parameters can be used for volute development or matching with a given rotor or efficiently implemented in automatic design optimization strategies.

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Unsteady Aerodynamics and Forces Characteristics of Dual Row Control Stage with Partial Admission Condition

10.29008/etc2017-025 ◽

2017 ◽

Author(s):

Zhigang LI ◽

Jun LI ◽

Kesong Wen ◽

Xin YAN ◽

Liming SONG

Keyword(s):

Unsteady Aerodynamics ◽

Control Stage ◽

Partial Admission

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Risk and Performance Analysis for Seismic Vibrators in the Far North Working Conditions

Geomodel 2017 – 19th Science and Applied Research Conference on Oil and Gas Geological Exploration and Development ◽

10.3997/2214-4609.201702300 ◽

2017 ◽

Author(s):

V. Smirnov ◽

E. Bondarev

Keyword(s):

Performance Analysis ◽

Working Conditions ◽

Far North ◽

And Performance

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Full 3-D Unsteady Numerical Simulation of Control Stage in Partial Admission Turbine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.741.509 ◽

2015 ◽

Vol 741 ◽

pp. 509-512

Author(s):

Guo Ping Li ◽

Ke Ke Gao ◽

Ke Yang ◽

Yong Hui Xie

Keyword(s):

Numerical Simulation ◽

Surface Pressure ◽

Flow Parameters ◽

Control Stage ◽

Air Turbine ◽

Unsteady Surface Pressure ◽

Partial Admission ◽

Unsteady Numerical Simulation ◽

Pressure Changes ◽

Mixing Losses

The unsteady flow parameters in control stage of partial admission are analyzed in details with full 3-D numerical simulation. The full annulus structure of air turbine in partial admission is modeled due to the unsymmetrical geometry. The partial admission is accomplished through the inlet blocked using segmental arc. The unsteady surface pressure changes of eight blades in the transition regions which demonstrate the power output ability are presented. That the entropy rise associated with the losses at different cross mainly caused by mixing losses and flow separation in partial admission is analyzed to estimate the efficiency distribution.

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