Study on the Increase in the Penetration Power in Accordance With the Changes in the Nozzle Hole of CNG High Pressure Injector

  • Authors

    • Mun Seok Choe
    • Kwon se Kim
    • Doo Seuk Choi
    2018-06-08
    https://doi.org/10.14419/ijet.v7i2.33.18009
  • Natural Gas Vehicle, High Pressure Injector, penetration power, Nozzle, Compressed Natural Gas, Methane

  • Abstract

    Background/Objectives: In this research, method of increasing the penetration power of CNG injector, which is the core factor in combustion, was conducted to improve the performances of natural gas vehicle engine.

    Methods/Statistical analysis: Research was carried out by designing 3D flow line after having assessed each of the compositional factors through 3D modeling. In order to confirm the penetration power according to the shape of the nozzle, models were designed with total hole-number of 4, 8, 12, 16, 20, 24 and 29. The area of nozzle was set within the error rate of 0.05% to minimize the effects of the area.

    Findings: As an analysis result, during injector spraying, the gas flow was biased toward the outside because the influence of the injector flow is great at injector center. In the case of speed distribution and Mach disk distribution in the after part of the nozzle guide, which is the index of penetration power, it was formed largest in the hole-20 type. Mass flow in injector was verified within the deviation of 0.6% in comparison to the base, irrespective of the number of the holes, while the mass flow was being influenced by injector nozzle area and setting inlet pressure.

    Improvements/Applications: This analysis was possible to increase the penetration power without affecting the internal shape of the injector and mass flow.

     

  • References

    1. [1] Kim, K. S., & Choi, D. S. (2017). Optimized Pressure Determined in Accordance with Variable Plunger Stroke of Internal Injector NGV. Defect and Diffusion Forum (DDF), 307, 41-51.

      [2] PATEL NIMIT, M., & PATEL, A. D. (2016). Conversion of Diesel Engine to Port Injection CNG Engine Using Gaseous Injector Nozzle Multi Holes Geometries Improvement. International Journal of Automotive Engineering, 6(3), 2220-2235.

      [3] Ryu, K. H.(2013). Effects of pilot injection pressure on the combustion and emissions characteristics in a diesel engine using biodiesel–CNG dual fuel. Energy Conversion and Management, 76, 506-516.

      [4] Kar, T., & Avinash, K. A. (2015).Development of a single cylinder CNG direct injection engine and its performance, emissions and combustion characteristics. International Journal of Oil, Gas and Coal Technology, 10(2), 204-220.

      [5] Iman, E., Iman, C., Masoud, Z., Alireza, H., & Brian, F. (2015).Injection characteristics of gaseous jet injected by a single-hole nozzle direct injector. Fuel, 160, 24-34.

      [6] Kim, K. S., & Choi, D. S. (2016).Analytic Visualization on Chocking Characteristics of Velocity according to a Change in Mass Flows and Plunger Gaps within NGV Injector. Advances and Applications in Fluid Mechanics, 19(3), 631-642.

      [7] Choe, M. S., & Choi, D. S. (2015).Study of the Optimization of the SCR Catalyst Position in by Exhaust System of using Mixer. Indian Journal of Science and Technology, 9(24), 1-5.

      [8] Choe, M. S., & Choi, D. S. (2015).Flow Analysis on Formation of Back-pressure in Exhaust System Applying Electronic-variable Valve. Indian Journal of Science and Technology, 8(21), 1-5.

      [9] Choi, M. G., Song, J. G., & Park, S. W. (2016).Modeling of the fuel injection and combustion process in a CNG direct injection engine. Fuel, 179, 168-178.

      [10] Choi, M. G., Lee, S. H., & Park, S. W. (2015).Numerical and experimental study of gaseous fuel injection for CNG direct injection. Fuel, 140, 693-700.

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  • How to Cite

    Seok Choe, M., se Kim, K., & Seuk Choi, D. (2018). Study on the Increase in the Penetration Power in Accordance With the Changes in the Nozzle Hole of CNG High Pressure Injector. International Journal of Engineering & Technology, 7(2.33), 118-1172. https://doi.org/10.14419/ijet.v7i2.33.18009

    Received date: 2018-08-20

    Accepted date: 2018-08-20

    Published date: 2018-06-08