Introducing of Arc-Shaped Wall-Jet in Boundary Layer Flow Control Application in Film Cooling-Numerical Simulations

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Aftabsavar, Ali | 2017

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 49478 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Javadi, Khodayar
Abstract:
In this research special type of jets those calls Arc-Shape Jets are studied. The meaning of this research is an effort to introduce this types of jets as a new method to film-cooling approach. In the primary section, the fitness of this scheme on a flat plate is studied. After this section, according to the results, this method is implemented on a turbine blade surface. According to the results, this method of film-cooling has suitable effectiveness in lateral direction, this has a reason of radially injection of the coolant jet. The main feature of this concept is operating by mass flow rate of much lower than other schemes. So that in a regular injection of a 45 degrees of actuator arc, same hydraulic diameter and aspect ratio of 0.2, the mass flow rate of coolant jet is about 10 percent of a rectangular jet. This means that the secondary effects and perturbation that causes of jet injection is reduces. Also due to the application of the quasi-radial jets in boundary layer flow control, the use of this type of cooling jets can be a way to modification in the blade design
Keywords:
Film Cooling ; Turbulence Flow Modeling ; Boundary Control ; Boundary Layer Flow ; Wall Jets Array ; Quasi-Radial Wall Jet ; Arc Shape Well Jets

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