1、,2010 Concepts ETI,Inc.The material contained herein is proprietary and confidential.All rights reserved.,Concepts NREC New turbine technology,Forward swept turbine design in automotive application,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserve
2、d.,2,Turbine/Compressor operation on engine,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,3,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.4,Turbine efficiency and power points,10 kW,5
3、kW,5-8-9-10-11-6:#Turbine work theoretically available in constant pressure turbocharging4-8-9-10-11-6-5:#Turbine work theoretically available in pulse turbocharging,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,5,Twin scroll turbine functio
4、n and objective Ideal cycle turbocharged,Twin scroll turbine function and objective Reduced exhaust volume i.e.Pulse turbocharging,Exhaust manifold has a very small volumePreserves available exhaust gas energyTurbine is subject to strongly varying inlet conditions,The material contained herein is pr
5、oprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,6,Cylinder and exhaust manifold pressure with different exhaust volume,Crank angle,EVO,BDC,TDC,10 bar,5 bar,3 bar,Important to keep low pressure in the cylinder at TDC,Small exhaust volumeNormal exhaust volume,The material contain
6、ed herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,7,Efficiency correlationsU/Cs-often used for radial turbines,U/Cs=U2/CsCs=2(cp(T0-T3)1/2,Turbine expansion ratio,Cs,Nozzle expansion ratio same as turbine expansion ratio,The material contained herein is proprietary
7、 and confidential 201020C1o0ncCeopntscEeTpIt,sInEcT.I,AIlnl cri.ghAtsll rreigshetrvserde.served.,8,Efficiency trends in gas stand test rig,Data range,Extrapolation,Turbine operation on engine,Known U/Cs data range from the Gas Stand test data,0.7,Power range,U/Cs operating range 0.33-1.2,known range
8、 0.58-0.7Turbine max power 9.7 kW,known range 0.35kW to 1.7 kW,Turbine inlet condition,What to look for when designing an turbine?#Gas stand data gives very little information energy vise,Area to be considered when designing the turbine.,The material contained herein is proprietary and confidential
9、2010 Concepts ETI,Inc.All rights reserved.,11,Objective of the forward swept turbine design,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,12,Engine simulation example case,Mixed flow same mean diameter,The material contained herein is propri
10、etary and confidential 2010 Concepts ETI,Inc.All rights reserved.,13,Mixed flow with increased diameter,Engine simulation example case,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,14,Engine simulation example case,The material contained her
11、ein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,15,Engine simulation example case,Turbine power at 1500 rpm,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,16,Engine simulation example case,Transient at 2000 rpm,
12、The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,17,Objective of the forward swept turbine design,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,18,Flow field of the forward swept vs.rad
13、ial turbine design at high blade loading,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,19,Flow field in an axial turbine design at high blade loading,HUB,RMS,Tip,The material contained herein is proprietary and confidential 2010 Concepts ETI
14、,Inc.All rights reserved.,20,Thanks for listening!#,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,21,The material c 2010 Conc,Axial turbine design from thontained herein is proprietary and confidentialepts ETI,Inc.All rights reserved.22,e 1940,ths,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,23,Axial turbine design from the 1940ths,The material contained herein is proprietary and confidential 2010 Concepts ETI,Inc.All rights reserved.,24,Axial turbine design from the 1940ths,
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