Said M. A. Ibrahim1, Mohamed. R. Taha2, and Mahmoud. N. Elqammash This email address is being protected from spambots. You need JavaScript enabled to view it.1

1Mechanical Engineering Department, Faculty of Engineering, Al-Azhar University, Cairo, Egypt
2Mechanical Power Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt


Received: May 10, 2022
Accepted: August 31, 2022
Publication Date: October 21, 2022

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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The goal of this research is to develop a pulse combustion simulation model in order to determine the parameters that influence the pulse combustor’s performance when the design geometry is optimized. The Helmholtz valveless pulse combustor type is one of the simplest pulse combustion processes. It has many advantages over conventional combustion, so it has been employed in a wide range of applications. There are many parameters that need to be studied in order to design this type of combustor to achieve optimal performance. This research presents a numerical and experimental investigation of pulse combustion. Numerical simulations of the pulse combustor’s performance and design parameters are performed using the FLUENT program. These simulations are then experimentally validated and confirmed to be accurately optimized in order to be applicable. The performance of the pulse combustor and NOx emissions were investigated for variable inlet pipe length, tailpipe length, and combustion chamber volumes. This research accurately predicts how the frequency and pressure amplitude change with the variation of the lengths of the inlet pipe and tailpipe, as well as the combustion chamber capacity. The results of this research showed that extremely low NOx emissions were produced by combustion chambers with small volumes and medium tailpipe lengths.

Keywords: Valveless, Pulse combustor, NOx emissions, pressure amplitude, Frequency, Tailpipe


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