The parallel-inlet holes with one-row, two-row and three-row film hole arrangements and different di- ameters are proposed to experimentally study their cooling characteristics. Detailed experimental processes and res...The parallel-inlet holes with one-row, two-row and three-row film hole arrangements and different di- ameters are proposed to experimentally study their cooling characteristics. Detailed experimental processes and results are described and carried out. Results indicate that heat transfer coefficient （HTC） is increased with the increase of blowing ratio. When the blowing ratio is lower, the distribution of HTC along the heated wall can be divided into three regions. For larger blowing ratio or diameter, the cooling characteristics oi parallel-inlet film holes are similar to those of convective heat transfer around flat. Furthermore, when hole diameter is deter- mined, the arrangement patterns of film hole and the blowing ratio take a great influence on HTC.展开更多
The design of most water strider robots follows the principle that all supporting legs are in a plane,and each supporting leg bears a certain load and the water strider robot can float on the water.To meet this princi...The design of most water strider robots follows the principle that all supporting legs are in a plane,and each supporting leg bears a certain load and the water strider robot can float on the water.To meet this principle,the number of supporting legs and the spacing between each supporting legs of the water strider robot must be increased,which makes the shape of water strider robots look like octopus.This study proposed a novel water strider robot named 5S-robot,which used five new umbrella-type footpads and a centrifugal pump-based actuating mechanism.Motion analysis model and force analysis model of 5S-robot were built.The general consistency between the results of motion experiments and those of numerical simulation verified the former models.For this 5S-robot,the maximum load of 110.5 g and forward speed of 207.1 mm s^(-1)and rotational speed of 1.22 rad s^(-1)were measured,respectively.展开更多
文摘The parallel-inlet holes with one-row, two-row and three-row film hole arrangements and different di- ameters are proposed to experimentally study their cooling characteristics. Detailed experimental processes and results are described and carried out. Results indicate that heat transfer coefficient （HTC） is increased with the increase of blowing ratio. When the blowing ratio is lower, the distribution of HTC along the heated wall can be divided into three regions. For larger blowing ratio or diameter, the cooling characteristics oi parallel-inlet film holes are similar to those of convective heat transfer around flat. Furthermore, when hole diameter is deter- mined, the arrangement patterns of film hole and the blowing ratio take a great influence on HTC.
基金financially supported by National Natural Science Foundation of China(No.51975550)Zhejiang Provincial Natural Science Foundation of China(No.LY21E050007)。
文摘The design of most water strider robots follows the principle that all supporting legs are in a plane,and each supporting leg bears a certain load and the water strider robot can float on the water.To meet this principle,the number of supporting legs and the spacing between each supporting legs of the water strider robot must be increased,which makes the shape of water strider robots look like octopus.This study proposed a novel water strider robot named 5S-robot,which used five new umbrella-type footpads and a centrifugal pump-based actuating mechanism.Motion analysis model and force analysis model of 5S-robot were built.The general consistency between the results of motion experiments and those of numerical simulation verified the former models.For this 5S-robot,the maximum load of 110.5 g and forward speed of 207.1 mm s^(-1)and rotational speed of 1.22 rad s^(-1)were measured,respectively.
