Numerical investigation on effect of rotor blade lean angle variation on single stage fan stability

2013 ◽  
Author(s):  
S. F. A. Hashmi ◽  
Qiao Wei Yang ◽  
Chen Ping Ping
Keyword(s):  
Numerical Investigation ◽  
Rotor Blade ◽  
Single Stage ◽  
Angle Variation ◽  
Lean Angle

A Numerical Investigation on the Volute/Diffuser Interaction due to the Axial Distortion at Impeller Exit

2000 ◽  
Author(s):  
Fahua Gu ◽  
Abraham Engeda ◽  
Mike Cave ◽  
Jean-Luc Di Liberti
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Investigation ◽  
Steady Flow ◽  
Centrifugal Compressor ◽  
Vortex Structure ◽  
Flow Model ◽  
Single Stage ◽  
Mass Flows

Abstract A numerical simulation is performed on a single stage centrifugal compressor using the commercially available CFD software, CFX-TASCflow. The steady flow is obtained by circumferentially averaging the exit fluxes of the impeller. Three runs are made at design condition and off-design conditions. The predicted performance is in agreement with experimental data. The flow details inside the stationary components are investigated, resulting in a flow model describing the volute/diffuser interaction at design and off-design conditions. The recirculation and twin vortex structure are found to explain the volute loss increase at lower and higher mass flows, respectively.

Numerical Investigation on Internal Flow Field of a Single-Stage Transonic Axial Compressor

2012 ◽  
Vol 15 (6) ◽  
pp. 85-91
Author(s):  
Ji-Han Song ◽  
Oh-Sik Hwang ◽  
Tae Choon Park ◽  
Byung-Jun Lim ◽  
Soo-Seok Yang ◽  
...  
Keyword(s):  
Flow Field ◽  
Numerical Investigation ◽  
Axial Compressor ◽  
Internal Flow ◽  
Single Stage ◽  
Transonic Axial Compressor

NREL VI rotor blade: numerical investigation and winglet design and optimization using CFD

Wind Energy ◽  
2013 ◽  
Vol 17 (4) ◽  
pp. 605-626 ◽  
Author(s):  
Monier A. Elfarra ◽  
Nilay Sezer-Uzol ◽  
I. Sinan Akmandor
Keyword(s):  
Numerical Investigation ◽  
Rotor Blade ◽  
Design And Optimization

A Numerical Investigation of Aerodynamic Characteristics of a Deteriorated Gas Turbine

2017 ◽  
Author(s):  
Koichi Yonezawa ◽  
Genki Nakai ◽  
Kazuyasu Sugiyama ◽  
Katsuhiko Sugita ◽  
Shuichi Umezawa
Keyword(s):  
Numerical Investigation ◽  
Gas Turbine ◽  
Rotor Blade ◽  
High Efficiency ◽  
Aerodynamic Characteristics ◽  
Rotor Blades ◽  
Second Stage ◽  
The Third ◽  
Time Operation ◽  
Third Stage

In order to keep a high efficiency of a gas turbine, it is important to make a suitable maintenance. Gas turbine nozzle guide vanes (NGVs) and turbine rotor blades deteriorate through a long-time operation due to various causes such as a particle attachment, erosion, and a thermal stress. In the present study, a numerical investigation has been carried out to clarify the influence of the NGV and the rotor blade deterioration on aerodynamics in a 3-stage gas turbine. Geometries of the NGV and the rotor blade were measured from a real gas turbine using a 3-D scanner. The first stage NGVs and rotor blades usually deteriorate seriously and are usually replaced at certain intervals. Two kinds of the geometries of the NGV and the rotor blade of the first stage were obtained, which are the new ones before use and the used ones to be replaced. For the second stage and the third stage, the geometries before use were used in the computations. The numerical results show that the isentropic efficiency of the first stage increases and that of the second stage decrease due to the deterioration of the first stage. The efficiency of the third stage is not affected significantly. The mechanisms are discussed from the observation of the flow fields.

Influence of Rotor Blade Aerodynamic Loading on the Performance of a Highly Loaded Turbine Stage

1987 ◽  
Vol 109 (2) ◽  
pp. 155-161 ◽  
Author(s):  
S. H. Moustapha ◽  
U. Okapuu ◽  
R. G. Williamson
Keyword(s):  
Rotor Blade ◽  
Pressure Ratio ◽  
Operating Conditions ◽  
Single Stage ◽  
Turbine Stage ◽  
Blade Loading ◽  
Aerodynamic Loading ◽  
Transonic Turbine ◽  
Stage Performance ◽  
Highly Loaded

This paper describes the performance of a highly loaded single-stage transonic turbine with a pressure ratio of 3.76 and a stage loading factor of 2.47. Tests were carried out with three rotors, covering a range of blade Zweifel coefficient of 0.77 to 1.18. Detailed traversing at rotor inlet and exit allowed an assessment of rotor and stage performance as a function of blade loading under realistic operating conditions. The effect of stator endwall contouring on overall stage performance was also investigated using two different contours with the same vane design.

scholarly journals Effect of Rotor Tip Clearance and Configuration on Overall Performance of a 12.77-Centimeter Tip Diameter Axial-Flow Turbine

1979 ◽  
Author(s):  
J. E. Haas ◽  
M. G. Kofskey
Keyword(s):  
Experimental Investigation ◽  
Rotor Blade ◽  
Axial Flow ◽  
Single Stage ◽  
Rotor Blades ◽  
Tip Clearance ◽  
Blade Height ◽  
Overall Performance ◽  
Flow Reaction ◽  
The One

An extensive experimental investigation was made to determine the effect of varying the rotor tip clearance of a 12.77-cm-tip diameter, single-stage, axial-flow reaction turbine. In this investigation, the rotor tip clearance was obtained by use of a recess in the casing above the rotor blades and also by use of a reduced blade height. For the recessed casing configuration, the optimum rotor blade height was found to be the one where the rotor tip diameter was equal to the stator tip diameter. The tip clearance loss associated with this optimum recessed casing configuration was less than that for the reduced blade height configuration.

scholarly journals The Effect of Alfha Angle Variation Sudu Rotor Blade On Wind Turbine Performance Using Blade NACA 0018

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Habibullah ◽  
Rachmad Firdaus
Keyword(s):  
Rotor Blade ◽  
Alternative Energy ◽  
Power Plants ◽  
Fossil Fuels ◽  
Mechanical Energy ◽  
Condition Dependence ◽  
Hydroelectric Power ◽  
Angle Variation ◽  
Turbine Wheel ◽  
Water Turbine

Indonesia currently has a growing need for energy, this will experience an energy crisis condition, dependence on fossil fuels will at least pose a serious threat, therefore there must be alternative energy as a substitute and reserves such as wind energy, water energy, solar energy, and other.  Because Indonesia has abundant water sources, with this my research intends to develop water as a renewable energy source that can be used as a source of energy for hydroelectric power plants or also called water turbines.  The water turbine is an early generator that uses the potential energy of water to become mechanical energy where the water turns the turbine wheel.  This study aims to determine the effect of the number of blades, the effect of the profile, the effect of rotor blade wing tip, Naca 0018, and the resulting energy efficiency.  This research uses experimental research type.

Sign in / Sign up

Export Citation Format

Share Document