CFD Simulation of a Supercritical Carbon Dioxide Radial-Inflow Turbine, Comparing the Results of Using Real Gas Equation of Estate and Real Gas Property File

Odabaee, Mostafa; Sauret, Emilie; Hooman, Kamel

doi:10.4028/www.scientific.net/amm.846.85

Cited by 29 publications

(18 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An input method of TASCflow RGP is used in ANSYS CFX 15.0. The accuracy of the RGP table used in the CFX code has been verified by Odabaee M et al [22] and Kim S G et al [21]. Figure 4 shows the value variation of density along with the pressure and temperature range studied in this research.…”

Section: Implementation Of Fluid Propertiessupporting

confidence: 61%

Investigation into Off-Design Performance of a S-CO2 Turbine Based on Concentrated Solar Power

2018

View full text Add to dashboard Cite

Research on concentrated solar power (CSP) plants has been increasing in recent years. Supercritical carbon dioxide (S-CO2) has been applied to solar power plants due to its promising physical properties. S-CO2 has a relatively low critical temperature of 31.1 °C and owns high density in the supercritical region. Hence, it is a vital working fluid in the application of low temperature heat source and miniature power equipment. Due to the fact that solar power system has a constantly changing heat source according to season and weather, a satisfactory off-design performance is necessary for the turbine in a solar power system. In this work, a S-CO2 radial-inflow turbine based on CSP is designed. A thorough numerical analysis of the turbine is then performed. To investigate the off-design performance of this turbine, three types of nozzle profiles with different leading edge diameters are adopted. Mach number, temperature and pressure distribution are covered to present the off-design effect with different nozzle profiles. Moreover, the relation of output power, mass flow rate and efficiency with different leading edge diameter (LED) are analyzed. Results show that different LED has a vital influence on the aerodynamic characteristics and off-design performance of the S-CO2 turbine based on CSP. In addition, the designed turbine with LED = 4 mm can obtain the highest mass flow rate and output power. While the turbine with LED = 10 mm provides slightly better off-design efficiency for CSP plants.

show abstract

Section: Implementation Of Fluid Propertiessupporting

confidence: 61%

Investigation into Off-Design Performance of a S-CO2 Turbine Based on Concentrated Solar Power

2018

View full text Add to dashboard Cite

show abstract

“…The accuracy of RGP format table using in ANSYS CFX has been validated by Odabaee et al [34] and Ameli et al [35]. We conduct a validation in the selected range of this research.…”

Section: Validation Of Fluid Propertymentioning

confidence: 96%

Numerical Investigation on Aerodynamic Performance of SCO2 and Air Radial-Inflow Turbines with Different Solidity Structures

Wang

Zhang

et al. 2020

Applied Sciences

View full text Add to dashboard Cite

Featured Application: This work can provide the design reference of rotor solidity for SCO 2 and air radial-inflow turbines as well as a new splitter structure to improve the performance of low solidity case. Abstract: Supercritical carbon dioxide (SCO 2 ) is of great use in miniature power systems. It obtains the characteristics of high density and low viscosity, which makes it possible to build a compact structure for turbomachinery. For a turbine design, an important issue is to figure out the appropriate solidity of the rotor. The objective of this research is to present the aerodynamic performance and provide the design reference for SCO 2 and air radial-inflow turbines considering different solidity structures. For the low solidity case of SCO 2 turbine, new splitter structures are proposed to improve its performance. The automatic design and simulation process are established by batch modes in MATLAB. The numerical investigation is based on a 3D viscous compressible N-S equation and the actual fluid property of SCO 2 and air. The distributions of flow parameters are first presented. Rotor blade load and aerodynamic force are then thoroughly analyzed and the aerodynamic performances of all cases are obtained. The SCO 2 turbine has larger power capacity and higher efficiency while the performance of the air turbine is less affected by rotor solidity. For both SCO 2 and air, small solidity can cause the unsatisfactory flow condition at the inlet and the shroud section of the rotor, while large solidity results in the aerodynamic loss at the trailing edge of rotor blade and the hub of rotor outlet. A suction side offset splitter can greatly improve the performance of the low solidity SCO 2 turbine.3 of 18 and working fluid used in the calculation are determined. The macro files of batch mode are called by MATLAB to execute the process in Workbench BladeGen, Turbogrid, CFX, and CFD-Post. The modeling, discretization, numerical simulation and post-processing are then completed. Finally, the program repeats this procedure to obtain the results of the required different cases.Appl. Sci. 2020, 10, x FOR PEER REVIEW 3 of 18 solidity and working fluid used in the calculation are determined. The macro files of batch mode are called by MATLAB to execute the process in Workbench BladeGen, Turbogrid, CFX, and CFD-Post. The modeling, discretization, numerical simulation and post-processing are then completed. Finally, the program repeats this procedure to obtain the results of the required different cases.

show abstract

“…To predict axial turbine performance, various loss models have been previously introduced starting from Soderberg [30], and then Ainely and Mathieson [31]. This has been followed by modifications presented by Dunham and Came [32], Craig and Cox [33], Kacker and Okapuu [34], and finally off-design correlations proposed by Moustapha et al [35]. Soderberg's loss model accounts for the effect of profile and secondary flow losses, while tip clearance and trailing edge losses are ignored.…”

Section: Loss Modellingmentioning

confidence: 99%

Recent Advancement of Thermal Fluid Engineering in the Supercritical CO<sub>2</sub> Power Cycle

2020

View full text Add to dashboard Cite

show abstract

CFD Simulation of a Supercritical Carbon Dioxide Radial-Inflow Turbine, Comparing the Results of Using Real Gas Equation of Estate and Real Gas Property File

Cited by 29 publications

References 6 publications

Investigation into Off-Design Performance of a S-CO2 Turbine Based on Concentrated Solar Power

Investigation into Off-Design Performance of a S-CO2 Turbine Based on Concentrated Solar Power

Numerical Investigation on Aerodynamic Performance of SCO2 and Air Radial-Inflow Turbines with Different Solidity Structures

Recent Advancement of Thermal Fluid Engineering in the Supercritical CO<sub>2</sub> Power Cycle

Contact Info

Product

Resources

About