Experimental Study on Comparison of Flame Propagation Velocity for the Performance Improvement of Natural Gas Engine

Title & Authors
Experimental Study on Comparison of Flame Propagation Velocity for the Performance Improvement of Natural Gas Engine
Chung Jin Do; Jeong Dong Soo;

Abstract
Natural gas possesses several characteristics that make it desirable as an engine fuel; 1)lower production cost, 2)abundant commodity and 3)cleaner energy source than gasoline. Due to the physics characteristics of natural gas, the volumetric efficiency and flame speed of a natural gas engine are lower than those of a gasoline engine, which results in a power loss of $\small{10-20{\%}}$ when compared to a normal gasoline engine. This paper describes the results of a research to improve the performance of a natural gas engine through the modification and controls of compression ratio, air/fuel ratio, spark advance and supercharging and method of measuring flame propagation velocity. It emphasizes how to improve the power characteristics of a natural gas engine. Combustion characteristics are also studied using an ion probe. The ion probe is applied to measure flame speed of gasoline and methane fuels to confirm the performance improvement of natural gas engine combustion characteristics.
Keywords
Engine performance;Flame propagation;Velocity;Ion Current;Supercharging effect;
Language
English
Cited by
References
1.
Karim, G. A. and I. A. Ali, 1973, The Effects of Low Ambient Temperatures on the Combustion of Natural Gas in a Single Cylinder Spark Ignition Engine, SAE 730084

2.
Baets, J. E., 1982, Combustion of Natural Gas and Gasoline in a Spark-Ignited Engine, UBS Report, AFL-82-02

3.
Perry, C, R. L. Evans and P. G. Hill, 1982, A Review of Performance of Natural Gas Fueled Otto Cycle Engines, UBS Report, AFL-82-05

4.
Eghbali, B., 1984, Natural Gas as a Vehicu-lar Fuel, SAE 841159

5.
Karim, G. A. and I. Wierzba, 1983, Comparative studies of Methane and Propane as Fuels for Spark Ignition and Compression Ignition Engines, SAE 831196

6.
Karim, G. A., J. J. Al-Himyary and J. D. Dale, 1989, An Examination of the Combustion Processes of a Methane Fueled Engine When Employing Plasma jet Ignition, SAE891639

7.
Chariton, S. J., D. J. Jager and M. Wilson, 1990, C-omputer Modeling & Experimental Investigation of a Lean Burn Natural Gas Engine, SAE 900228

8.
Kanury, A. M., 1975, Introduction to Combustion Phenomena, Gordon and Breach, New York, 35-75pp

9.
Deckers, J. and V. A. Jeggelen, 1959, Proc. 7th Symp. (lnt.) on Combustion, The Combustion Institute, 254-255pp

10.
P. F. Knewstubb and T. M. Sugden, 1959, Proc. 7th Symp. (lnt.) on Combustion, The Combustion Institute, 247- 248pp

11.
Fontijn, A., W. J. Miller and J. M. Hogen, 1965, Proc. 10th Symp. (Int.) on Combustion, The Combustion Institute, 545-546pp

12.
Kido, H. and S. Huang, 1991, A Study on the Structure of Premixed Turbulent Propagating Flames, JSME Int. Journal, 34, 78-86

13.
Chung, J. D., D. S. Jeong and S. W. Seo, 1991, A Study on Performance Improvement of Natural Gas Engine, in Proc. 6th Int. Pacific Conference on Automotive Engg., Octo. 28-Nov.l, Seoul, Korea, 913-918pp

14.
Kang, K. Y., S. W. Suh and D. S. Jeong, 1993, A Studyon the Effect of Fast Burn for Different Combustion Chamber Geometries of Gasoline Engine using an Ion Current Method, Korea Soc. of Mechanical Engg., 17, 1633-1639

15.
Chung, J. D., C. S. Lee and B. C. Kwon, 1994, Measurement of Flame Propagation Velocity using an Ion Current Apparatus Design, Korea Society for Energy Eng., 3, 62-69

16.
J. D. Chung and Y. Mizutan, 1997, Effect of Turbulent Mixing on Spray Ignition in Spray System, KSME International Journal, 11(2), 186-194

17.
Tabaczynski, R. J., F. H. Trinker and B. A. S. Shannon, 1980, Further Refinement and Validation of a Turbulent Flame Propagation Model for Spark Ignition Engines, Combustion and Flame, 39, 111-113

18.
Hirano, T., 1979, Ion-Current Fluctuation Recorded with a Cylindrical Electrostatic Probe Passing Pre mixed Flames, Combustion and Flame, 36, 179 182