Experimental analyses were conducted under identical experimental conditions on the heat transfer between a constant flux flat plate and round air jet for both conventional swirled jets. Vane-type swirl generators inserted at nozzle exit used to produce swirl. The measurements performed fixed Reynolds number value (Re = 23,000) calculated tube’s inside diameter. A comparison jets with numbers o...

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This study presents an experimental investigation of a single droplet with different impingement velocity impinge on the hydrophilic and superhydrophobic substrates under normal and icing temperature by using high-speed image and infrared image techniques. The aim is to better understand the unsteady heat transfer and transient icing process of the aircraft icing caused by the supercooled large...

Internal mist/steam blade cooling technology has been considered for the future generation of Advanced Turbine Systems (ATS). Fine water droplets of about 5 mm were carried by steam through a single slot jet onto a heated target surface in a confined channel. Experiments covered Reynolds numbers from 7500 to 25,000 and heat fluxes from 3 to 21 kW/m. The experimental results indicate that the co...

A numerical and experimental investigation was conducted to analyze dropwise evaporative cooling of heated surfaces with various wettability characteristics. The surface wettability was tuned by nanostructure modifications. Spray-cooling experiments on these surfaces show that surfaces with better wettability have better heat transfer rate and higher critical heat flux (CHF). Single droplet imp...

A numerical study has been carried out for slot air jet impingement cooling of horizontal concentric circular cylinders. The slot air jet is situated at the symmetry line of a horizontal cylinder along the gravity vector and impinges on the bottom of the outer cylinder which is designated as θ=0°. The outer cylinder is partially opened at the top with a width of W=30mm and is kept at constant t...

With decrease in size of electronic equipment’s, effective heat removal is a major challenge these days. Present work focuses on implementation novel hybrid method which helps attain transfer enhancement. An experimental investigation carried out to study effect pulse air jet local distribution flat surface. Effect nozzle plate distance (z/d = 2 6), Reynolds number (5000 9000), pulsating freque...