Post-PSCs Business Development Opportunities

Yusoff, Samsudin; Kario, Mohamed Wahid

doi:10.2523/50066-ms

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mass mixing ratio of CNG to Diesel is selected as 0.7 and 0.9. This mixing ration is the common practice in the steady of the gas to liquid mixing for fuel application, as reported by [3,5,10]. Table 3.…”

Section: Cng Inlet Boundarymentioning

confidence: 99%

See 1 more Smart Citation

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

Wahhab

Aziz

Al-Kayiem

et al. 2015

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Abstract. 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.1. Introduction Due to the large occurrence in a variety of natural and practical applications, multiphase turbulent mixtures have attracted significant engineering interest. These applications include liquid-gas fueled combustors, liquid fuel injected combustion engines, mixtures propellant combustion and fire suppression and control. All of these situations are involving dispersed phase species which considerably affects the thermochemical nature of the surrounding carrier phase. Therefore, mixing and evaporation processes in liquid fuel combustors have marked effects on ignition characteristics [1]. Since this area is an emerging one and the technology has not been disseminated to the scale of driving market, it is essential that specialized components, that require modification, need to be studied. Air-fuel ratio characteristics exert a large influence on exhaust emissions and fuel economy in internal combustion engine. With increasing demand for high fuel efficiency and low emissions, the need to supply the engine cylinders with a well-defined mixture under all circumstances has become more essential for better engine performance [2]. A liquid-gas fuels mixer is one of the important components in such application and it is identified that additional research work need to be carried out in establishing a design procedure for this application.To ensure proper performance, the liquid-gas mixer should be reproducible and has unequivocal adjustment procedures. For that, a Diesel-CNG mixer has been simulated and this paper presents the simulation results at various design configurations and operational conditions. The simulation was carried out using that ANSYS-FLUENT version 14 software. The turbulence model used in this study is k-ε model which represents a compromise between computational time and precision, for subsonic internal flow [3][4][5].

show abstract

Section: Cng Inlet Boundarymentioning

confidence: 99%

“…The simulation was carried out using that ANSYS-FLUENT version 14 software. The turbulence model used in this study is k-ε model which represents a compromise between computational time and precision, for subsonic internal flow [3][4][5]. …”

mentioning

confidence: 99%