On the accuracy of turbulence models for CFD simulations of vertical axis wind turbines

Autor: Bert Blocken, Hamid Montazeri, Abdolrahim Rezaeiha
Přispěvatelé: Building Physics
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Technology
Eddy-viscosity models (EVMs)
02 engineering and technology
Turbine
Industrial and Manufacturing Engineering
law.invention
LEADING-EDGE SERRATIONS
Inviscid flow
law
Validation
0202 electrical engineering
electronic engineering
information engineering
Wind energy
Mathematics
Accuracy analysis
Turbulence
NATURAL VENTILATION PERFORMANCE
CFD (Computational Fluid Dynamics)
Turbulence modeling
Aerodynamics
Mechanics
Scrutinization
Pollution
PART I
General Energy
LOCAL VARIABLES
AERODYNAMIC PERFORMANCE
Physical Sciences
Thermodynamics
Wind turbine
Energy & Fuels
020209 energy
Wake
Computational fluid dynamics
020401 chemical engineering
Intermittency
DYNAMIC STALL
0204 chemical engineering
Electrical and Electronic Engineering
Vertical axis wind turbine (VAWT)
Civil and Structural Engineering
ATMOSPHERIC BOUNDARY-LAYER
Science & Technology
URANS
business.industry
Mechanical Engineering
H-DARRIEUS
Building and Construction
REYNOLDS-NUMBER
DOMAIN SIZE
CFD guideline
business
Intermittency transition models
Zdroj: Energy
Energy, 180, 838-857. Elsevier
ISSN: 0360-5442
Popis: A comparative analysis of seven commonly-used eddy-viscosity turbulence models for CFD simulations of VAWTs is presented. The models include one- to four-equations, namely the Spalart-Allmaras (SA), RNG k-ε, realizable k-ε, SST k-ω, SST k-ω with an additional intermittency transition model (SSTI), k-kl-ω and transition SST (TSST) k-ω models. In addition, the inviscid modeling is included in the comparison. The evaluation is based on validation with three sets of experiments for three VAWTs with different geometrical characteristics operating in a wide range of operational conditions, from dynamic stall to optimal regime and to highly-rotational flow regime. The focus is on the turbine wake, the turbine power performance, and the blade aerodynamics. High-fidelity incompressible unsteady Reynolds-Averaged Navier-Stokes (URANS) simulations are employed. The extensive analysis reveals high sensitivity of the simulation results to the turbulence model. This is especially the case for the turbine power coefficient CP. The results show that the inviscid, SA, RNG k-ε, realizable k-ε and k-kl-ω models clearly fail in reproducing the aerodynamic performance of VAWTs. Only the SST model variants (SST k-ω, SSTI and TSST) are capable of exhibiting reasonable agreement with all the experimental data sets, where the transitional SST k-ω versions (SSTI and TSST) are recommended as the models of choice especially in the transitional flow regime.
Databáze: OpenAIRE
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