Heat transfer enhancement by jet impingement within a channel
Heat transfer enhancement by jet impingement within a channel from Varun Bhalerao
Heat transfer enhancement by jet impingement within a channel

Position: Leader of the 4 member project team. Primary activities: Designed (CREO 2.0) and manufactured (cutting, grinding, turning, facing etc.) the experimental setup.

In the project, we seek to increase the heat transfer rate within a channel by the method of jet impingement for the application of cooling of turbine blades.To simulate the turbine blade, an Aluminium plate of dimensions 95*600 sq.mm was used.
For the experiment, parameters varied were:
Aluminium plate:
1) Plain plate
2) Dimpled plate (5 mm dimple diameter with an array of 30*10)
Position:
1) Inclination of the plate: 5 degrees
2) Aspect ratio: from 1,2 and 3.
Reynolds number of air:
Varied Reynolds number from 1000 to 5000.
Primary conclusions obtained:
1) Dimpled plate has a higher rate of heater transfer than the plain plate.
2) Inclined plate configuration has higher rate of heat transfer than the flat plate configuration.
3) Higher aspect ratio gives higher rate of heat transfer

The experimental setup used for the project was designed on Creo 2.0, analyzed and then manufactured. Main components used were T-type thermocouple, cast iron jets, acrylic test section and Aluminium test plate simulating turbine blade.
This view shows the temperature indicator connected to the Aluminium test plate.
30 cast iron nozzles were used which assisted in jet impingement.
Blower was used to force the air through the nozzles.
Test section showing the fitting of the 30 nozzles between the feed and the test channel.
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Heat transfer enhancement by jet impingement within a channel

Position: Leader of the 4 member project team. Primary activities: Designed (CREO 2.0) and manufactured (cutting, grinding, turning, facing etc.) the experimental setup.

In the project, we seek to increase the heat transfer rate within a channel by the method of jet impingement for the application of cooling of turbine blades.To simulate the turbine blade, an Aluminium plate of dimensions 95*600 sq.mm was used.
For the experiment, parameters varied were:
Aluminium plate:
1) Plain plate
2) Dimpled plate (5 mm dimple diameter with an array of 30*10)
Position:
1) Inclination of the plate: 5 degrees
2) Aspect ratio: from 1,2 and 3.
Reynolds number of air:
Varied Reynolds number from 1000 to 5000.
Primary conclusions obtained:
1) Dimpled plate has a higher rate of heater transfer than the plain plate.
2) Inclined plate configuration has higher rate of heat transfer than the flat plate configuration.
3) Higher aspect ratio gives higher rate of heat transfer

Varun Bhalerao
Mechanical engineering graduate student Rochester, NY