Local heat transfer for jet impingement onto a concave surface including injection nozzle length to diameter and curvature ratio effects

Effect of orifice geometry and orifice to test section spacing on distribution of wall static pressure on a convex surface

“…When θ = 0° the test section receives maximum velocity form jet, this velocity helps to get maximum dynamic pressure resulting, stagnation point will reach the maximum value of pressure compared adjacent points on the test section. Similar Cp profiles are seen in some of research works [16][17][18][19]. Pressure loss coefficient (Pc) Study for different orifice.…”

“…The dimensionless Cp and Cpo for various Reynolds number are obtained at different Z/dh for all orifice.Figure 3. shows the Cp variation along the circumference of the convex test section for all orifice at Z/dh = 1. The graphs Cp vs θ revels that the wall static pressure does not depends on the jet Reynolds number as all the curves take same nature for all Re (10000-50000) with some variation in the Cp value at each point, similar independence of Re over Cp and Cpo are seen in other works discussed literature review[16][17][18][19][20] but it is observed that the Cp and Cpo are dependent on dimensionless parameter orifice to test section spacing (Z/dh) which is explained further in present study.…”

Conjugate heat transfer analysis of a rotor blade with coolant channels

“…A series of wire mesh (4) are added in the middle of the settling chamber (5) to reduce flow turbulence. After the settling chamber, the air passes to the contraction zone (6) where flows accelerate and leave toward the cascade test section (7).…”

“…Several convective cooling schemes for turbine blade cooling are reported in the archival literature. [2][3][4][5] Most of the investigations dealt with simplified geometries, such as flat or curved surface, [6][7][8][9] without considering the actual geometrical profile of the blade. In addition to the simplified geometries, researchers also use idealistic heat transfer boundary conditions, such as constant temperature or constant heat flux, at the target wall.…”

Experimental characterization and model validation of liquid jet impingement cooling using a high spatial resolution and programmable thermal test chip

“…Electrical measurement techniques on the other hand require physical contact (resulting in an additional contact resistance and disturbance of the measurements [20]) to measure the temperature at the limited number of discrete locations of the sensors. Thermocouples are a commonly used method which are placed on or near the heated surface that is being cooled by impinging jets [15,16,17,18]. An example is the study by Maddox [19] where an array of twelve K-type thermocouples embedded in the measurement block with a pitch of 3 mm was used to capture the temperature and heat transfer coefficient peak.…”