Optimization and experimental verification of the vibro-impact capsule system in fluid pipeline.
Crawford, Alasdair R.
Islam, Sheikh Zahidul
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YAN, Y., LIU, Y., JIANG, H., PENG, Z., CRAWFORD, A., WILLIAMSON, J., THOMSON, J., KERINS, G., YUSUPOV, A. and ISLAM, S. 2018. Optimization and experimental verification of the vibro-impact capsule system in fluid pipeline. Proceedings of the Institution of Mechanical Engineers, part C: journal of mechanical engineering science [online], Online First. Available from: https://doi.org/10.1177/0954406218766200
This paper studies the prototype development of the vibro-impact capsule system aiming for autonomous mobile sensing for pipeline inspection. Self-propelled progression of the system is obtained by employing a vibro-impact oscillator encapsuled in the capsule without the requirement of any external mechanisms, such as wheels, arms, or legs. A dummy capsule prototype is designed, and the best geometric parameters, capsule and cap arc lengths, for minimizing fluid resistance forces are obtained through two-dimensional and three-dimensional computational fluid dynamics analyses, which are confirmed by wind tunnel tests. In order to verify the concept of self-propulsion, both original and optimized capsule prototypes are tested in a fluid pipe. Experimental results are compared with computational fluid dynamics simulations to confirm the efficacy of the vibro-impact self-propelled driving.