Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 52, Issue 2 (2018) 198-204 198 Journal of Advanced Research in Fluid Mechanics and Thermal Sciences Journal homepage: www.akademiabaru.com/arfmts.html ISSN: 2289-7879 Numerical Simulation of Spark Ignition Engine with Pre Combustion Chamber (PCC) Muhammad Ikhwan Muazzam 1 , Fudhail Abdul Munir 1,* , Adnan Roseli 1 , Mohd Shukri Yob 1 , Ridhwan Jumaidin 2 1 Centre for Advanced Research on Energy (CARe), Fakulti Kejuruteraan Mekanikal, Universiti Teknikal Malaysia Melaka (UTeM), Hang Tuah Jaya, 76100, Durian Tunggal, Melaka, Malaysia 2 Fakulti Teknologi Kejuruteraan Mekanikal & Pembuatan, Universiti Teknikal Malaysia Melaka (UTeM), Hang Tuah Jaya, 76100, Durian Tunggal, Melaka, Malaysia ARTICLE INFO ABSTRACT Article history: Received 13 October 2018 Received in revised form 2 December 2018 Accepted 10 December 2018 Available online 12 December 2018 In this paper, a numerical model of a spark ignition (SI) engine was developed to simulate the effect of pre-combustion chamber (PCC) on the dynamics flow inside the engine. Four concept designs of PCC were used in this simulation. The single cylinder SI engine model and PCC were generated by using CATIA V5 R21 software. The SI model is based on Loncin G200F (D) engine generator. After that, cold flow simulation is used to analyze each type of the PCC powered with natural gas fuel by ANSYS Fluent 16.0 simulation software. Each of the PCC simulation investigated by its flow behavior for the velocity vectors and turbulence kinetic energy (TKE). This PCC can give bigger effect to the engine performance by 10% - 15% using natural gas as the fuel source. The result revealed that PCC1 is the best concept design of pre- combustion chamber as it generates highest velocity vectors and TKE. Keywords: Pre-Combustion Chamber, SI Engine, Natural Gas, Cold Flow Simulation Copyright © 2018 PENERBIT AKADEMIA BARU - All rights reserved 1. Introduction It is widely known that fossil fuels (petrol and diesel) are non-renewable source and it reserves around the world are limited. Besides, the demand of hydrocarbon fuels source made the fossil fuel price increases. The emission from combustion of this fuels are harmful and become an issue for health and global climate change. As a result, many countries have strict regulations for limitation of exhaust gas emission from vehicles [1-3]. Compressed Natural Gas (CNG) was chosen as alternative fuel due to many reasons such as high-octane number which mean it can operate in high compression ratio engine [4]. Moreover, it has low carbon/hydrogen ratio. Hence, it emits smaller amount of CO 2 emission compared to any other hydrocarbon fuels [5]. Besides, the price of CNG is lower than fossil fuels. * Corresponding author. E-mail address: fudhail@utem.edu.my (Fudhail Abdul Munir) Penerbit Akademia Baru Open Access