Optical Diagnostics of Spray Development in Diesel Engines

  • Ashutosh JenaEmail author
Part of the Energy, Environment, and Sustainability book series (ENENSU)


In order to comply with the current and future emission norms applicable to diesel engines, understanding the fuel-air mixing phenomena in depth is quite crucial. Fuel spray inside the cylinder of an engine in operation interacts with in-cylinder gases as well as with solid boundaries. Fuel spray impinging on the cylinder wall and piston top, may subsequently enhance soot formation and hence, study and analysis of fuel spary characteristics can help to minimize these effects. However, study of the physics of spray evolvement and dynamics demands advanced diagnostics and numerical techniques. Many attempts have been made in developing computational models for analyzing the fuel-air and fuel-wall interactions. Despite those efforts it remains an exciting area of research to accurately model the spray behavior under dynamic conditions inside the engine cylinder. These models need continuous inputs from experimental studies for validation and for further development purposes. For experimental investigations point of view, several optical methods have been adopted viz. Phase Doppler Interferometry (PDI), Shadowgraphy, Schlieren photography etc. However, deployment of these techniques for acquiring precise and reliable data requires certain expertises. The aim of this chapter is to confine various optical diagnostics techniques applicable to diesel engines. A critical review of these methods has been presented for further advancement in the field.


Spray wall impingement Optical diagnosis Diesel engines 


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© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringIndian Institute of Technology KanpurKanpurIndia

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