FINDING MP AND CP USING ULTRASONIC VELOCITY PROFILE ON RECTANGULAR TWIN JETS

摘要

Data obtained from the UVP probe agreed with previously observed values in other researchers' work. An interesting phenomenon found was velocity values found further away from the UVP probe tended to be higher than values closer to the probe. This is also seen at a figure from Wiggins and Ruggles in which values plotted from UVP further away from the probe are bigger, even though their locations are further from the nozzle's exit. When the velocity values were compared to the PIV and LDV measurements, the values plotted form further locations were more reliable. Although the vertical locations of MP and CP were correctly measured, the issues on lateral location accuracy and under estimated velocity profile close to the sensor need to be investigated in further works. UVP could be used to map flow velocity vectors of opaque liquids, but it can't describe time fluctuations of the fluids, when the flow is highly turbulent. In order to obtain greater detail throughout the flow, measurements with shorter spacing between each other are required. Future work using different angles and locations to map the flow are required to fully understand the UVP capabilities. The MP and CP validation obtained with the UVP can be used for future researchers to obtain a relationship between the dimensions of the twin jets and the location of the merging and combining point.