The Effects of Equivalence Ratio on Pressure Wave Development during Knocking Combustion

Authors

  • D. Deb Department of Mathematics, Shahjalal University of Science & Technology, Sylhet, Bangladesh http://orcid.org/0000-0001-8417-3897
  • M. A. Uddin Department of Mathematics, Shahjalal University of Science & Technology, Sylhet, Bangladesh.
  • H. Terashima Division of Mechanical & Space Engineering Hokkaido University, Hokkaido, Japan.
  • N. Oshima Division of Mechanical & Space Engineering Hokkaido University, Hokkaido, Japan.

DOI:

https://doi.org/10.3329/jsr.v10i2.34491

Keywords:

End-gas, Autoignition, Knocking, Equivalence ratio, n-heptane.

Abstract

A knocking combustion in a one-dimensional constant volume reactor has been simulated with a detailed chemical kinetic mechanism of n-heptane premixed gases by using the compressible Navier-Stokes equations. This study focuses on the impact of the various equivalence ratios (0.6–1.4) in the pressure wave development during knocking combustion in an account of different initial temperature (600–900K). The result demonstrates the autoignition process in the end-gas region and explains the knocking phenomenon on different equivalence ratio. In an adiabatic wall condition, the largest knocking intensity occurs in equivalence ratio 1.4 whereas the lowest knocking intensity found in equivalence ratio 0.6. Regarding to initial temperatures, a strong peak of knocking is generated around 650K in all the equivalence ratios (0.8–1.4). However, yet a small perceptivity of knocking is found in around 750K for each equivalence ratio. In case of smaller equivalence ratios, a weak knocking occurs, which can be identified by the behavior of the pressure wave generation in the end-gas region.

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Author Biographies

M. A. Uddin, Department of Mathematics, Shahjalal University of Science & Technology, Sylhet, Bangladesh.

Professor

Department of Mathematics,

Shahjalal University of Science & Technology,

Sylhet, Bangladesh.

H. Terashima, Division of Mechanical & Space Engineering Hokkaido University, Hokkaido, Japan.

Associate Professor

Division of Mechanical & Space Engineering

Hokkaido University, Hokkaido, Japan

N. Oshima, Division of Mechanical & Space Engineering Hokkaido University, Hokkaido, Japan.

Professor

Division of Mechanical & Space Engineering

Hokkaido University, Hokkaido, Japan

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Published

2018-05-01

How to Cite

Deb, D., Uddin, M. A., Terashima, H., & Oshima, N. (2018). The Effects of Equivalence Ratio on Pressure Wave Development during Knocking Combustion. Journal of Scientific Research, 10(2), 117–131. https://doi.org/10.3329/jsr.v10i2.34491

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Section

Section A: Physical and Mathematical Sciences