Research Papers: Gas Turbines: Combustion, Fuels, and Emissions

Experimental Investigations on Diesel Engine Forced Induction and Exhaust Gas Recirculation (EGR) Using Exhaust Gas Assisted Jet Compressor

[+] Author and Article Information
A. Kalaisselvane

Associate Professor
Department of Mechanical Engineering,
Pondicherry Engineering College,
Puducherry 605014, India
e-mail: kalaisselvane@pec.edu

G. S. Gunasegarane

Research Scholar
Department of Applied Mechanics,
Indian Institute of Technology (Madras),
Chennai 600036, India

N. Alagumurthy


K. Palaniradja

Associate Professor
Department of Mechanical Engineering,
Pondicherry Engineering College,
Puducherry 605014, India

1Corresponding author.

Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received November 28, 2012; final manuscript received August 29, 2013; published online November 14, 2013. Assoc. Editor: Song-Charng Kong.

J. Eng. Gas Turbines Power 136(3), 031503 (Nov 14, 2013) (8 pages) Paper No: GTP-12-1459; doi: 10.1115/1.4025723 History: Received November 28, 2012; Revised August 29, 2013

Even though the conventional method of supercharging and turbocharging of an internal combustion engine increases the engine specific power output, part of the shaft power developed by the engine is consumed by the superchargers. The control system that is present in both the chargers further complicates the system. This study proposes a novel method of forced induction in a diesel engine by using a jet compressor run by exhaust gas recirculation (EGR). This method apart from increasing the specific power output reduces the NOx formation by the engine due to forced induction. Performance analysis of the jet compressor using exhaust gas as the motive stream and atmospheric air as the propelled stream was carried out. Using the standard available code, the governing equations were solved numerically to get the optimum operating conditions such as exhaust gas pressure, temperature, and flow rate for a three cylinder diesel engine. The dimensions of the jet compressor were determined by solving the energy balance equations obtained from the constant rate momentum change method. Using the commercial software fluent, the performance optimization of jet compressor used for forced induction in a diesel engine was made for different percentage of EGR input and estimated the power output. From the results obtained, a performance map was drawn for the three cylinder diesel engine to get the optimum boost pressure and maximum entrainment ratio for a given percentage of exhaust gas recirculation and power output. Experiments were conducted on a three cylinder diesel engine fitted with a fabricated jet compressor with EGR used for forced induction application. Results obtained from the experiments were in good agreement with the numerical results obtained from fluent analysis.

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Fig. 1

Schematic view of a turbo-supercharger using the jet compressor with forced draft

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Fig. 2

Schematic layout of a jet compressor

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Fig. 3

Flow chart for design of the jet compressor using the CRMC method

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Fig. 4

Comparison of the jet compressor diffuser profile between conventional and the CRMC design

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Fig. 5

Grid view of the jet compressor connected to engine exhaust manifold

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Fig. 6

Flow chart to create performance map of the jet compressor using the computer engine simulation code and fluent

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Fig. 7

Performance map of jet compressor for different boost pressure and engine power output

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Fig. 8

Photograph of entire arrangement of the experimental setup

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Fig. 9

Comparison of simulated and experimental results of the jet compressor forced induction

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Fig. 10

Performance map along with combustion temperature inside the cylinder

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Fig. 11

Comparison of simulated and experimental % EGR versus load curve when operated under optimum condition

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Fig. 12

Comparison of NOx level obtained from experiment with and without EGR



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