UROP Proceedings 2020-21

School of Engineering Department of Mechanical and Aerospace Engineering 180 Study of Flapping Fins of a Bio-inspired Manta Ray Robot Supervisor: QIU Huihe / MAE Student: HO Ka Ying / MAE Course: UROP2100, Spring To achieve high swimming efficiency, a bio-inspired manta ray robot must be flexible to replicate the delicate flapping motion of a manta ray. However, the flapping mechanism should remain simple as the robot should be compact for practical application. In contrary to conventional “bar and linkage” design, soft robotic mechanismmay offer simple solutions in replicating flexible motion. In this report, a soft robotic mechanism, fin ray structure will be explored. An experiment analyzing the flapping performance of a robotic fin will also be discussed, with details about the experimental setup and methodology (Particle image velocimetry). Possible future approaches will be proposed based on the discussions. Environmental Impact by Air Traffic: Assessing Aircraft Noise nearby HK Airport Supervisor: REDONNET Stephane / MAE Co-supervisor: HORNER, Andrew Brian / CSE Student: CHAN Ngai Nam / AE Course: UROP1100, Summer The Aircraft Noise Assessment project focussed on obtaining on-site aircraft noise data to provide verifications for an existing aircraft noise level prediction software developed by HKUST Aerospace researchers. The project was planned and executed in three consecutive phases of preparation, on-site data acquisition and signal post-processing, relying on audio recording equipment and data processing software to conduct the required research, with development of an aircraft noise data Test Suite. The results of the signal processed were compared to the prediction software to conduction error analysis and initiate possible modifications and improvements, and the Test Suite could be continuously utilised in parallel to validate the prediction software in future. Experimental Characterization of a Modified Airfoil Offering Higher Aerodynamic Performances Supervisor: REDONNET Stephane / MAE Student: LEUNG Tsz Yin / AERO Course: UROP1000, Summer A new class of aircraft known as miniature unmanned aerial vehicles is becoming popular for everyday tasks. These light-weight aircraft operate within low to moderate Reynolds numbers and have very simple high-lift devices. An unconventional airfoil with slits added across their upper and lower surface promises to offer improved performance at high angles of attack at Re 6 million was tested at Re 133 000. This study confirmed the findings of a previous study and found the optimal slit location is independent of the Reynolds number, while the thickness of the slit should be increased as the Reynolds number decreases.