Heat Transfer Characteristics of Submerged and Free Surface Air-assistant Water Jet Impingement
Received Date: March 13, 2021; Published Date: March 19, 2021
Heat transfer and fluid flow characteristics of air-assistant submerged and free surface water impinging jets are experimentally investigated. Results showed that the Nusselt number and pressure decrease exponentially in both free surface and submerged jets for all volumetric qualities in jet deflection region. In transition region, the Nusselt number and pressure of the submerged jet and free surface jet decrease since the jet deflection effect was disappeared. In buoyance effect region, the Nusselt number and pressure increase in the free surface jet since the potential energy increases, while the Nusselt number and pressure decrease in the submerged jet since the bubbles are not impinged the plate due to the buoyancy effect.
Keywords: Two-phase; Impinging jet; Heat transfer; Circular jet