Automotive Radial Turbine Expander Design WHR

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Automotive Radial Turbine Expander Design WHR ( automotive-radial-turbine-expander-design-whr )

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13 FIGURE β€Ž4-8: EXPANSION MACHINES AS FUNCTIONS OF 𝑁𝑠AND 𝐷𝑠[196]. ................................................ 94 FIGURE β€Ž4-9: TURBOMACHINES AS FUNCTIONS OF 𝑁𝑠[197]. ..................................................................... 94 FIGURE β€Ž4-10: RADIAL TURBINE PERFORMANCE VERSUS𝑁𝑠[199].............................................................. 94 FIGURE β€Ž4-11: PERFORMANCE OF RADIAL TURBINE VERSUS FLOW COEFFICIENT [235]. ........................... 96 FIGURE β€Ž4-12: PERFORMANCE OF RADIAL TURBINE VERSUS Ξ¦ AND Ρ° [232]. ........................................... 96 FIGURE β€Ž4-13:LOCATION OF THE CURRENT EXPANSION MACHINE BASED ON AIR TURBINE CORRELATIONS [197][232][196]. ................................................................................................................................. 99 FIGURE β€Ž4-14: LOCATION OF THE CURRENT EXPANSION MACHINE BASED ON ORGANIC EXPANSION MACHINES BY THE AUTHOR (SEE SECTION β€Ž2.3.3). ........................................................................... 100 FIGURE β€Ž4-15: FLOWCHART OF THE PROPOSED METHODOLOGY............................................................. 102 FIGURE β€Ž5-1: FLOWCHART OF THE OPTIMISATION ALGORITHM .............................................................. 107 FIGURE β€Ž5-2: VELOCITY TRIANGLES OF THE ROTOR INLET(LEFT) AND ROTOR EXIT(RIGHT)...................... 110 FIGURE β€Ž5-3: FLOWCHART OF THE DESIGN POINT USING 𝑁𝑠CORRELATION. ........................................... 114 FIGURE β€Ž5-4: FLOWCHART OF THE DESIGN POINT USING FLOW AND LOADING COEFFICIENTS CORRELATION. ................................................................................................................................. 122 FIGURE β€Ž5-5: (A) SHAPE OF RADIAL AND NON-RADIAL BLADES AND (B) EFFECCT OF NON-ZERO BLADE ANGLE π›½π‘π‘™π‘Žπ‘‘π‘’, 4 ON THE EFFICIENCY OF THE TURBINE. ................................................................ 127 FIGURE β€Ž5-6: EFFECT OF FLOW COEFFICIENT πœ‘ ON THE INVESTIGATED PARAMETERS. ........................... 129 FIGURE β€Ž5-7: EFFECT OF LOADING COEFFICIENT 𝛹ON THE INVESTIGATED PARAMETERS. ...................... 130 FIGURE β€Ž5-8: EFFECT OF ROTATIONAL SPEED𝑁ON THE INVESTIGATED PARAMETERS............................. 131 FIGURE β€Ž5-9: EFFECT OF MASS FLOW RATE𝑀𝐹𝑅ON THE INVESTIGATED PARAMETERS. ......................... 132 FIGURE β€Ž5-10: EFFECT OF SPECIFIC SPEED 𝑁𝑠 ON THE INVESTIGATED PARAMETERS. ............................. 134 FIGURE β€Ž5-11: SUMMARY OF EFFECTS OF THE INPUT CONDITIONS ON THE INVESTIGATED PARAMETERS. .......................................................................................................................................................... 135 FIGURE β€Ž5-12: RESULTS OF THE OC USING DIFFERENT OBJECTIVE FUNCTIONS. ...................................... 136 FIGURE β€Ž5-13: CONTRIBUTIONS OF THE ROTOR ENTHALPY LOSSES ON THE PERFORMANCE OF THE TURBINE. .......................................................................................................................................... 137 FIGURE β€Ž5-14: FLOWCHART OF THE OFF-DESIGN METHODOLGY. ............................................................ 144 FIGURE β€Ž5-15: EFFECT OF STATOR DEVIATION ANGLE ON TURBINE πœ‚π‘‘π‘ AND MFR. .................................. 152 FIGURE β€Ž5-16: EFFECTS OF ROTOR DEVIATION ANGLE ON TURBINE πœ‚π‘‘π‘ AND MFR. ................................. 153 FIGURE β€Ž5-17: EFFECTS OF STATOR BLOCKAGE FACTOR ON TURBINE πœ‚π‘‘π‘ AND MFR................................ 153 FIGURE β€Ž5-18: EFFECTS OF ROTOR BLOCKAGE FACTOR ON TURBINE πœ‚π‘‘π‘ AND MFR. ................................ 154 FIGURE β€Ž5-19: EFFECTS OF ROTOR INCIDENCE ANGLE ON TURBINE πœ‚π‘‘π‘ AND MFR................................... 155 FIGURE β€Ž5-20: πœ‚π‘‘π‘  COMPARISON BETWEEN MOC AND CFD RESULTS. ..................................................... 156 FIGURE β€Ž5-21: DEVIATION IN πœ‚π‘‘π‘  BETWEEN MOC AND CFD. .................................................................... 156

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