Thesis Defense - Onuralp Işıl (MSME)

Onuralp Işıl - M.Sc. Mechanical Engineering

Prof. Dr. Mehmet Arık – Advisor

Date: 12.01.2021

Time: 14:00

Location: This meeting will be held ONLINE. Please send an e-mail to gizem.bakir@ozyegin.edu.tr in order to participate in this defense.

An Investigation into Mechanical and Thermal Characteristics of Synthetic Jet Actuators with Compact Packaging

Thesis Committee:

Prof. Dr. Mehmet Arık , Özyeğin University

Asst.Prof. Polat Şendur , Özyeğin University

Asst.Prof. Altuğ Başol , Özyeğin University

Asst.Prof. Enis Kayış , Özyeğin University

Prof. Dr. Kaşif Teker, Marmara University

Abstract:

This thesis studies one of the novel technologies in active cooling in ambient temperature operating conditions, synthetic jet actuators. Synthetic jet actuators play an important role in passive-to-active cooling with condensed volumes, and long life-cycle capabilities. Composed of piezo actuated disks and an orifice, synthetic jet actuators excite the inner air volume by agitating piezo disks and creating an airflow. Given their high advantage in cooling performance, low cost of material and production brings synthetic jet to the more feasible alternative in electronics cooling.

To achieve precision and consistency in mechanical aspects of synthetic jet actuators, a manufacturing rig combined with a robotic dispenser and pneumatic pick and place system has been designed and produced. Visual microscope examination for boundary condition validation has been conducted to minimize the uncertainties resulting from mechanical inconsistencies.

In-house manufactured synthetic jet actuators have been tested to measure their mechanical and thermal performance, using laser vibrometer and PID controlled heat transfer test system.

Orifice shape and design have been studied by experimentation and analytical derivations in this thesis. In-house manufactured synthetic jet actuators are also compared with their alternatives, axial fans, where natural convection, forced convection by axial fan, and synthetic jet impingement cases are observed. Later, as a benchmark study, a third-party synthetic jet product has been analyzed and thermally compared with the jets manufactured in this thesis. Finally, a novel packaging study has been performed to create a product with validated driving frequency at the optimum resonant mode shape, and highest cooling performance, using finite element analysis (FEA) for validation and optimization of mechanical aspect and package design of a final product.

Bio: 

Onuralp Işıl has born in 1994 in Istanbul. He is graduated from B.Sc. in Mechanical Engineering at Ozyegin University in 2017. He is currently in pursuit of his M.Sc. degree in Mechanical Engineering at Ozyegin University. He is a member of EVATEG laboratory team, working on thermal management of micro-electronics. His field of focus is electronics cooling with an advanced cooling alternative, synthetic jets.