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RADIAL-INFLOW TURBINE ONE AND
TRI-DIMENSIONAL DESIGN ANALYSIS OF
600 KW SIMPLE CYCLE GAS ENGINE
MSc Rubén Alexis Miranda Carrillo
Grupo de Estudos em Tecnologias de Conversão de Energia – GETEC
About Us
• The Study Group on Energy Conversion Technologies – GETEC
of Federal University of Itajubá – UNIFEI, was created in 2009.
• In the area of energy conversion, GETEC has experience in
analysis and simulation of gas turbine cycles and CFD
simulations of compressors, turbines, combustion chambers and
compact heat exchangers recuperators, as well as laboratory
experiments.
• GETEC offers training courses in gas turbines engine, centrifugal
and reciprocating compressors, internal combustion engines,
among others.
3
A compact micro-turbine schematic.
Radial-inflow
rotor Nozzle
Introduction
Radial-inflow turbine assemble.
Objective
This work presents the numerical meanline investigationson the aerothermodynamic design of the nozzle and theradial-inflow rotor for a 600 kW simple cycle gas turbineengine using a One-dimensional computer FORTRANCode (OFC), for the design and analysis of radial-inflowturbine components.
Aerothermodynamic Model
6
One-dimensional FORTRAN Code: TurbinaDP
Preliminary design.
r2
LZ
b3
r3h
r3s
Radial-inflow rotor
r
r0
r1
b0
Nozzle
The meanline method.
The Meanline Method
Validation Results
* Glassman, A.J., (1976), “Computer program for design
analysis of radial-inflow turbines”, NASA TN D-8164, Report
N° E-8394, Lewis Research Center, National Aeronautics
and Space Administration, Cleveland, Ohio, USA, 64 p.
The Gate Cycle Simulation
Stream
Temperature
(K)
Pressure
(kPa)
Mass flow rate
(kg/s)
S1 288 101.32 4.288
S2 461 405.28 4.288
S3 288 500.00 0.212
S4 1123 396 4.5
S5 846 101.32 4.5
Gas Turbine Assemble: Simulations regions
Computational Mesh
Radial-Inflow Rotor
Nozzle
Boundary Conditions
• Average total pressure and total temperature are imposed
at the inlet area.
• Average static pressure imposed at the outlet area.
• Heat transfer model = Total energy.
• Turbulence model = SST.
• Turbulent wall functions = Automatic.
• Rotor domain motion = Rotating.
• Nozzle domain = Stationary.
Simulations Results: Nozzle
14
Simulations Results: Radial-Inflow Rotor
Recirculation in the inlet region of a
radial turbine rotor passage.
2 2C U 2 2C U
TurbinaDP Literature
IInc = -29.767Moustapha, (2003):
IInc = -20 to -40
Comparison Results: CFD - FORTRAN
Conclusions
• The OFC method for radial turbines design has been developed,
being capable of predicting the efficiency of most “well designed”
radial turbines with good accuracy. No knowledge of the turbine
geometry beyond basic overall dimensions is required, therefore, the
method regarded suitable for preliminary design.
• The most differences were found when comparing the OFC method
results and the NASA TN D-8164 showing discrepancies lower than
10% between the values calculated by each computer program and
when comparing the OFC method and the ANSYS CFX 12.0
simulations results, with discrepancies lower than 13% between the
values calculated for each simulations program.
Acknowledgments
• Petrobras Research and Development Center (CENPES)
• National Council of Technological and Scientific Development
(CNPq)
• Foundation for Research Support of Minas Gerais (FAPEMIG)
