The influence of injector coking deposits on the spray field of single-hole mechanical port fuel injectors and multihole common rail direct injection (CRDi) injectors was studied using light scattering technique coupled with image processing and analysis. Instead of employing the traditional accelerated coking process to study injector spray field deterioration, in-service injectors were selected and cleaned using a commercial fuel system cleaning procedure. Variation in atomization characteristics of coked and cleaned injectors were observed based on the spatial distribution of fine, medium, and coarse droplets in the near-field region of the injector spray zone and analyzed as a function of the intensity of scattered light. The improvement in the atomization perceived by this method was compared with traditional techniques like spray cone angle measurement, speed characterization of spray jets, and weight reduction of injector nozzles and needles. It was observed that after the fuel system cleaning procedure, a reduction in the number of coarse droplets in the near-field region and an increase in the number of medium and finely sized droplets was observed, suggesting better atomization of fuel in the near field spray zone.
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February 2018
Research-Article
Method of Identifying Injector Coking From the Spray Field of Mechanical and CRDi Injectors Using Intensity of Scattered Light
Ronith Stanly,
Ronith Stanly
Functional Fluids Laboratory,
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: ronithstanly@yahoo.com
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: ronithstanly@yahoo.com
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Gopakumar Parameswaran,
Gopakumar Parameswaran
Functional Fluids Laboratory,
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: gopa@mmm.com
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: gopa@mmm.com
Search for other works by this author on:
Bibin Sagaram
Bibin Sagaram
Functional Fluids Laboratory,
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: bibin.sagaram@gmail.com
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: bibin.sagaram@gmail.com
Search for other works by this author on:
Ronith Stanly
Functional Fluids Laboratory,
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: ronithstanly@yahoo.com
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: ronithstanly@yahoo.com
Gopakumar Parameswaran
Functional Fluids Laboratory,
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: gopa@mmm.com
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: gopa@mmm.com
Bibin Sagaram
Functional Fluids Laboratory,
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: bibin.sagaram@gmail.com
3M India Limited,
No. 48-51, Electronics City,
Bangalore 560100, India
e-mail: bibin.sagaram@gmail.com
Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received March 22, 2017; final manuscript received July 7, 2017; published online October 10, 2017. Assoc. Editor: Nadir Yilmaz.
J. Eng. Gas Turbines Power. Feb 2018, 140(2): 021503 (7 pages)
Published Online: October 10, 2017
Article history
Received:
March 22, 2017
Revised:
July 7, 2017
Citation
Stanly, R., Parameswaran, G., and Sagaram, B. (October 10, 2017). "Method of Identifying Injector Coking From the Spray Field of Mechanical and CRDi Injectors Using Intensity of Scattered Light." ASME. J. Eng. Gas Turbines Power. February 2018; 140(2): 021503. https://doi.org/10.1115/1.4037869
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