### Abstract

The Free Space Parameter (FSP) is evaluated as a predictor for the efficiency of a Variable Geometry Turbine (VGT). Experiments show an optimum value at 2 times the vane height. However, the optimum was found to be dependent on the pressure ratio, yielding an optimum closer to 2.5 at pressures of 2 and 2.5 bar. After this validation the FSP of a conventional VGT is evaluated and an attempt is made to improve the efficiency of this turbine using the FSP. A new geometry is proposed which yields more favorable FSP values. Experiments show that at the original design point the efficiency is unchanged. However, at both larger and smaller nozzle area's the turbine efficiency improves as predicted by the FSP values. A relative efficiency improvement of 3 to 28 % is attained.

Language | English |
---|---|

Article number | 24-0154 |

Journal | SAE Technical Papers |

Volume | 2017 |

DOIs | |

State | Published - 1 Jan 2017 |

Event | SAE 13th International Conference on Engines and Vehicles, ICE 2017 - Capri, Napoli, Italy Duration: 10 Sep 2017 → 14 Sep 2017 |

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*SAE Technical Papers*, vol. 2017, 24-0154. DOI: 10.4271/2017-24-0154

**Redesign of a radial turbine variable stator geometry with optimized free space parameter for improved efficiency.** / Eichhorn, Ruud; Boot, Michael; Smeulders, David; Cuijpers, Michel.

Research output: Contribution to journal › Conference article › Academic › peer-review

TY - JOUR

T1 - Redesign of a radial turbine variable stator geometry with optimized free space parameter for improved efficiency

AU - Eichhorn,Ruud

AU - Boot,Michael

AU - Smeulders,David

AU - Cuijpers,Michel

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The Free Space Parameter (FSP) is evaluated as a predictor for the efficiency of a Variable Geometry Turbine (VGT). Experiments show an optimum value at 2 times the vane height. However, the optimum was found to be dependent on the pressure ratio, yielding an optimum closer to 2.5 at pressures of 2 and 2.5 bar. After this validation the FSP of a conventional VGT is evaluated and an attempt is made to improve the efficiency of this turbine using the FSP. A new geometry is proposed which yields more favorable FSP values. Experiments show that at the original design point the efficiency is unchanged. However, at both larger and smaller nozzle area's the turbine efficiency improves as predicted by the FSP values. A relative efficiency improvement of 3 to 28 % is attained.

AB - The Free Space Parameter (FSP) is evaluated as a predictor for the efficiency of a Variable Geometry Turbine (VGT). Experiments show an optimum value at 2 times the vane height. However, the optimum was found to be dependent on the pressure ratio, yielding an optimum closer to 2.5 at pressures of 2 and 2.5 bar. After this validation the FSP of a conventional VGT is evaluated and an attempt is made to improve the efficiency of this turbine using the FSP. A new geometry is proposed which yields more favorable FSP values. Experiments show that at the original design point the efficiency is unchanged. However, at both larger and smaller nozzle area's the turbine efficiency improves as predicted by the FSP values. A relative efficiency improvement of 3 to 28 % is attained.

UR - http://www.scopus.com/inward/record.url?scp=85028456855&partnerID=8YFLogxK

U2 - 10.4271/2017-24-0154

DO - 10.4271/2017-24-0154

M3 - Conference article

VL - 2017

JO - SAE Technical Papers

T2 - SAE Technical Papers

JF - SAE Technical Papers

SN - 0148-7191

M1 - 24-0154

ER -