ReviewSpray and combustion characterization for internal combustion engines using optical measuring techniques – A review
Research highlights
► The paper reviews about optical measurement techniques that were used in IC (internal combustion) engine, such as visualization, PIV (particle image velocimetry), LIF (laser induced fluorescence), and PDPA (phase Doppler particle anemometry). ► The experimental work that was done previously concentrated on macroscopic and microscopic spray and combustion characteristics of various type of fuel such as gasoline, diesel, biodiesel and oxygenated fuel. ► The review paper gives a short assessment of the presented methods and some proposals for the future research work.
Section snippets
Significant of study on spray and combustion characteristics of IC engine
The fast depletion of fossil fuel resources and their contribution to environmental pollution from ICE (internal combustion engine) are the major issues that led to increasing demand for efficient and eco-friendly energy management schemes to be implemented in industrial, commercial and domestic sectors. One of the feasible ways to tackle the aforesaid problems is to study the macroscopic and microscopic parameters of the fuel spray to ensure high engine performance with low emissions level.
The
Optical techniques
Optical techniques are commonly used for macroscopic and microscopic fuel spray and combustion characterization. However, these techniques can often be difficult to implement and very expensive. According to Roisman et al. [36] the spray, especially in the neighborhood of the nozzle, is very dense; making the use of optical measurement techniques very difficult. Some examples of optical techniques are visualization, PIV, LIF and PDPA. The visualization technique has been reviewed by Chigier [37]
Conclusion
A thorough review of published works on spray and combustion characterization of IC engines using optical measuring technique has been made. Previous works have been conducted in either modified engines or CV vessels, with both systems being equipped with an optical access made of quartz or fused silica. More investigations have to be carried out on the fundamental of spray and combustion of fuel in IC engines. Hence, there is a wide scope for researchers in this area to develop efficient and
Acknowledgement
This research has been financially supported by the USM-RU-PGRS provided by UNIVERSITI SAINS MALAYSIA.
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