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150 CFD results. The CFD results mentioned in this chapter are only for comparison. The full CFD results are detailed in Chapter 6. Turbine Awas conducted by Spence et al. [266]using air as the working fluid. The tests were conducted at a range of turbine speeds between 30,000 rpm and 60,000 rpm and pressure ratios between 1.3 and 4. Seven stator configurations were used in the test. All configurations have the same basic blade shape but different vane angles and, consequently, different throat areas. Evaluating the code using real fluids is crucial. Turbine B, that was conducted by Shao et al[267] using R123 (high dense organic fluid) as the working was used. Different heat source temperatures were investigated in the study. Isentropic total to total efficiency was also investigated at turbine speeds of 20,000–54,000 rpm and pressure ratios of 1.4–2.6. In the current study, a heat source of 120 °C was selected to validate the results of the proposed methodology. Detailed geometry parameters of Turbines A and B are presented in Table 5-5. However, significant geometrical parameters (stator opening and blade height) were not provided in the aforementioned reference [267]. Therefore, the code was also validated with the current turbine (Turbine C), in which all the geometrical parameters are available. The experimental results of Turbine C are presented in Chapter 7. Table 5-6 presents the input thermodynamic parameters for three turbines. Table 5-5: Geometric Parameters of Turbines A and B. Parameter Nozzle vane number Nozzle inlet diameter Nozzle vane height Rotor inlet tip diameter Rotor inlet tip width Rotor inlet blade angle Rotor blade number Rotor exducer tip diameter Rotor exducer hub diameter Rotor exducer blade thickness Rotor exit radial clearance Symbol Turbine A 16 152.0 mm 10.2 mm 99.06 mm 10.2 mm 0 deg 11 79.0 mm 30.0 mm 1.6 mm 0.4 mm Turbine B 17 70.0 mm 10.2 mm 99.06 mm 10.2 mm 0 deg 12 34.0 mm 19.0 mm 1.6 mm 0.4 mm - 𝑟2 𝑏2 𝑑4 𝑏4 𝛽𝑏𝑙𝑎𝑑𝑒 ,4 - 𝑟5𝑡 𝑟5 𝑡5 𝜀PDF Image | Automotive Radial Turbine Expander Design WHR
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