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| Structure and motion characteristics as well as jet focusing mechanism of snapping shrimp claw |
| QINShimu 1 QIN Junqi1YANG Yuliang 1SHI Yan 2 HAN Haoliang 2DI Changchun 3 |
1.Artillery Engineering Department, Shijiazhuang Campus, Army Engineering University, Shijiazhuang 050003, China;
2.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210000, China;
3.Troop 63961, PLA, Beijing 100020, China |
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Abstract Snapping shrimps use pressure pulse generated by cavitation bubble rupture to hunt foods, cavitation jet produced by their claws has high energy focusing feature.Studying snapping shrimp claw structure’s jet focusing mechanism and affection laws is very important for exploring cavitation effect and developing bionic cavitation devices.Here, CT scanning technique and high-speed photography one were used to study structure and motion characteristics of a claw, and reveal its motion law; CFD simulation to imitate cavitation jet generation process and flow field state was used to present claw structure’s jet focusing mechanism.Grooves with different sizes were used to simulate influences of groove structure on jet.The results showed that groove structure of snapping shrimp claw can produce jet focusing action; when its size is about 0.15 mm, it has the optimal jet focusing effect.
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Received: 14 January 2019
Published: 28 October 2019
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