Spray Theory and Applications

IIT Madras Course , Prof. Mahesh Panchagnula

Lecture 1: Introduction to sprays and their applications

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Lecture Details :

Spray Theory and Applications by Prof. Mahesh Panchagnula, Department of Applied Mechanics,IIT Madras.For more details on NPTEL visit http://nptel.ac.in

Course Description :

Introduction : Basic spray processes, Factors controlling spray formation - Drop size and velocity distribution functions : Number distributions, Mass/volume distributions, Empirical distributions, Theoretical distributions - Sheet and ligament breakup : Instability analyses for ligaments and sheets, Design models based on instability analyses - Drop formation : Static and dynamic force balances, Continuity considerations, Secondary atomization, Collisions and coalescence - Drop motion and spray-surroundings interactions : Steady trajectories (gas turbines, spray cooling, paint sprays), Entrainment.

Drop evaporation : Steady evaporation, Unsteady evaporation, Convective effects - Internal fluid mechanics : Swirl atomizers, Impinging jet atomizers - External spray characteristics : Cone angle, Radial and circumferential mass flux distributions - Atomizer performance : Modern design models for pressure-swirl atomizers, impinging jet atomizers, transient pressure (Diesel) atomizers - Measurement techniques : Drop sizing by Malvern and P/DPA, Drop velocity by P/DPA, Mass flux distribution via patternators and P/DPA

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