Analysis on oscillating actuator frequency influnece to the fluid flow characterization for 2D contractile water jet thruster

Shaari, Muhammad Farid and A.B, Husaini and Nordin, Normayati and Saw, S. K. and Samad, Zahurin (2013) Analysis on oscillating actuator frequency influnece to the fluid flow characterization for 2D contractile water jet thruster. In: International Conference on Mechanical Engineering Research (ICMER2013), 1-3 July 2013, Kuantan, Pahang.

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Abstract

Contractile body is an alternative mechanism instead of rotating blade propeller to generate water jet for locomotion. The oscillating motion of the actuator at different frequencies varies the pressure and volume of the pressure chamber in time to draw in and jetting out the water at certain mass flow rate. The aim of this research was to analyze the influence of the actuating frequency on the fluid flow in the pressure chamber of the thruster during this inflation-deflation process. A 70mm x 70mm x 18mm (L x W x T) 2D water jet thruster was fabricated for this purpose. The contractile function was driven using two lateral pneumatic actuators where the fluid flow analysis was focused on the X-Y plane vector. Observation was carried out using video camera and Matlab image measurement technique to determine the volume of the flowing mass. The result demonstrated that greater actuating frequency decreases the fluid flow rate and the Reynolds number. This observations shows that the higher frequency would give higher mass flow rate during water jet generation.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:oscillating actuator; actuating frequency; water jet thruster; mass flow rate; thrust force
Subjects:T Technology > TJ Mechanical engineering and machinery > TJ836-935 Hydraulic machinery
Divisions:Faculty of Mechanical and Manufacturing Engineering > Department of Manufacturing and Industrial Engineering
ID Code:4056
Deposited By:Normajihan Abd. Rahman
Deposited On:26 Jul 2013 11:12
Last Modified:21 Jan 2015 16:19

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