By definition, these coefficients are interrelated (linked) through the expression for the open water efficiency. 2. While the dependent variables are always KT and KQ, the independent ones are some or all of the following: advance coefficient, pitch ratio, area ratio, number of blades and ...
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1) open-water propeller test 螺旋桨敞水试验 2) propeller test tunnel 螺旋桨试验水洞 3) open propeller efficiency 螺旋桨敞水效率 4) Propeller test 螺旋桨试验 5) propeller whirling test 螺旋桨旋转试验 6) propeller balance test 螺旋桨平衡试验 ...
关键词: Open water tests Propeller efficiency Propellers Uncertainty 被引量: 12 年份: 1996 收藏 引用 批量引用 报错 分享 全部来源 求助全文 Semantic Scholar ResearchGate trid.trb.org 相似文献 引证文献Numerical Analysis and Validation of Propeller Open-water Performance Based on CFD (in Chinese)GAO ...
A Study on the Effect of Toroidal Propeller Parameters on Efficiency and Thrust The Reynolds-Averaged Navier鈥揝tokes (RANS) method is employed to analyze the propeller's open-water performance, taking into account cavitation flow, and a test bed was constructed to verify the rationality of CFD...
The number of blades chosen has an effect on the level of unsteady forces acting on them. Considering the efficiency point of view, optimum open water efficiency increases with increase in the number of blades. 4. Blade Outline Blade outline plays a very important role in propulsive efficiency....
It is well known, and can be simply demonstrated with the aid of a Bp−δ chart that, for a given propulsion problem, the propeller open water efficiency can be increased by reducing rpm and allowing the diameter of the propeller to increase freely. As a consequence propeller design should...
Song et al., 2015 investigated the differences in open water performance of hub-type and hub-less RDTs by means of CFD analysis, and concluded that the hub type RDT had a less hydrodynamic efficiency than the hub less RDT. The main reason was that the existence of the hub reduced the ...
Focusing on the open water performance of integrated propulsors with pre-swirl stator,duct and rotor,using factor analysis theory and de-compound experimental method,the interaction characteristics among components and open water efficiency of the propulsor were analyzed and the expression and measureme...
Because of the fixed-blade angle of this type of propeller, it operates near peak efficiency only at one condition. To overcome the limitations of the simple fixed-pitch propeller, configurations that provide for variable blade angles are used. The blades of these propellers are retained in ...