Modeling of diesel/CNG mixing in a pre-injection chamber

Diesel engines performance can be improved by adding combustible gases to the liquid diesel. In this paper, the propagation of a two phase flow liquid-gas fuel mixture into a pre-mixer is investigated numerically by computational fluid dynamics simulation. CNG was injected into the diesel within a c...

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Main Authors: Abdul-Wahhab, H.A., Aziz, A.R.A., Al-Kayiem, H.H., Nasif, M.S.
Format: Conference or Workshop Item
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.30704 /
Published: Institute of Physics Publishing 2015
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960158526&doi=10.1088%2f1757-899X%2f100%2f1%2f012044&partnerID=40&md5=5a3180b1a80efd40082aaaea12b8fbef
http://eprints.utp.edu.my/30704/
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spelling utp-eprints.307042022-03-25T07:15:19Z Modeling of diesel/CNG mixing in a pre-injection chamber Abdul-Wahhab, H.A. Aziz, A.R.A. Al-Kayiem, H.H. Nasif, M.S. Diesel engines performance can be improved by adding combustible gases to the liquid diesel. In this paper, the propagation of a two phase flow liquid-gas fuel mixture into a pre-mixer is investigated numerically by computational fluid dynamics simulation. CNG was injected into the diesel within a cylindrical conduit operates as pre-mixer. Four injection models of Diesel-CNG were simulated using ANSYS-FLUENT commercial software. Two CNG jet diameters were used of 1 and 2 mm and the diesel pipe diameter was 9 mm. Two configurations were considered for the gas injection. In the first the gas was injected from one side while for the second two side entries were used. The CNG to Diesel pressure ratio was varied between 1.5 and 3. The CNG to Diesel mass flow ratios were varied between 0.7 and 0.9. The results demonstrate that using double-sided injection increased the homogeneity of the mixture due to the swirl and acceleration of the mixture. Mass fraction, in both cases, was found to increase as the mixture flows towards the exit. As a result, this enhanced mixing is likely to lead to improvement in the combustion performance. Institute of Physics Publishing 2015 Conference or Workshop Item NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960158526&doi=10.1088%2f1757-899X%2f100%2f1%2f012044&partnerID=40&md5=5a3180b1a80efd40082aaaea12b8fbef Abdul-Wahhab, H.A. and Aziz, A.R.A. and Al-Kayiem, H.H. and Nasif, M.S. (2015) Modeling of diesel/CNG mixing in a pre-injection chamber. In: UNSPECIFIED. http://eprints.utp.edu.my/30704/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Diesel engines performance can be improved by adding combustible gases to the liquid diesel. In this paper, the propagation of a two phase flow liquid-gas fuel mixture into a pre-mixer is investigated numerically by computational fluid dynamics simulation. CNG was injected into the diesel within a cylindrical conduit operates as pre-mixer. Four injection models of Diesel-CNG were simulated using ANSYS-FLUENT commercial software. Two CNG jet diameters were used of 1 and 2 mm and the diesel pipe diameter was 9 mm. Two configurations were considered for the gas injection. In the first the gas was injected from one side while for the second two side entries were used. The CNG to Diesel pressure ratio was varied between 1.5 and 3. The CNG to Diesel mass flow ratios were varied between 0.7 and 0.9. The results demonstrate that using double-sided injection increased the homogeneity of the mixture due to the swirl and acceleration of the mixture. Mass fraction, in both cases, was found to increase as the mixture flows towards the exit. As a result, this enhanced mixing is likely to lead to improvement in the combustion performance.
format Conference or Workshop Item
author Abdul-Wahhab, H.A.
Aziz, A.R.A.
Al-Kayiem, H.H.
Nasif, M.S.
spellingShingle Abdul-Wahhab, H.A.
Aziz, A.R.A.
Al-Kayiem, H.H.
Nasif, M.S.
Modeling of diesel/CNG mixing in a pre-injection chamber
author_sort Abdul-Wahhab, H.A.
title Modeling of diesel/CNG mixing in a pre-injection chamber
title_short Modeling of diesel/CNG mixing in a pre-injection chamber
title_full Modeling of diesel/CNG mixing in a pre-injection chamber
title_fullStr Modeling of diesel/CNG mixing in a pre-injection chamber
title_full_unstemmed Modeling of diesel/CNG mixing in a pre-injection chamber
title_sort modeling of diesel/cng mixing in a pre-injection chamber
publisher Institute of Physics Publishing
publishDate 2015
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960158526&doi=10.1088%2f1757-899X%2f100%2f1%2f012044&partnerID=40&md5=5a3180b1a80efd40082aaaea12b8fbef
http://eprints.utp.edu.my/30704/
_version_ 1741197452919177216
score 11.62408

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