Experimental Study of the Effect of a Cross Airflow on the Dynamics and Heat Transfer Performance of Impinging Circular Water Jets on a Concave Surface

In this study, the impingement of a concave surface by hot water jets is investigated. The are subjected to cross airflow at ambient temperature in order study effects interactions between both fluids on jet dynamics and heat flux stagnation area. Different parameters such as diameter, separation distance two adjacent jets, Reynolds numbers number varied. These studies reveal that imposing annular space orifice impacted can increase wetted area 40% also enhance transfer coefficient much 105%. It was observed reducing air mass flow ratio values below 0.75 leads tilting widest uniformly heated among tested be obtained with diameter 4.5 for single impingement.