The invention belongs to the technical field of fluid propulsion, and particularly relates to a fluid propeller based on a coanda effect, which comprises a radial flow type impeller, a curved surface flow guide body and a rotary power mechanism, the curved-surface flow guide body is in a cover shape; the radial flow type impeller is arranged at the radial flow type impeller mounting position, a fluid inlet is formed in the axial front side of the radial flow type impeller, and a fluid outlet is formed in the radial outer side of the radial flow type impeller; the radial flow type impeller abuts against the curved surface flow guide body, fluid is sucked in in the axial direction of the radial flow type impeller and then pushed out in the radial direction, and the flowing direction of the pushed-out fluid is tangent to the arc surface, so that the wall of the fluid pushed out from the fluid outlet is attached to the arc surface to flow. According to the scheme, the radial flow type impeller is adopted to suck fluid and push the fluid out, underwater cavitation noise is not prone to being generated, meanwhile, the coanda effect is utilized, fluid wall attachment flowing is achieved through the curved surface flow guiding body, the direction and the shape of wake flow are guided, the wake flow is more uniform, noise generated by turbulent flow generated by wake flow disturbance is not prone to being generated, and noise reduction is effectively achieved.
本发明属于流体推进技术领域,具体涉及一种基于康达效应的流体推进器,包括径流式叶轮、曲面导流体和旋转式动力机构;所述曲面导流体呈罩状;所述径流式叶轮设置于径流式叶轮安装位处,该径流式叶轮的轴向前侧设置有流体进口,在径流式叶轮的径向外侧设置有流体出口;所述径流式叶轮与曲面导流体抵近,流体沿径流式叶轮的轴向被吸入后沿径向被推出,流体被推出后的流动方向相切于所述圆弧面,使得从流体出口被推出的流体壁附于圆弧面流动。本方案采用径流式叶轮吸入流体并将流体推出,不易产生水下空泡噪声,同时利用康达效应,通过曲面导流体实现流体壁附流动,引导尾流的方向和形态,使得尾流更加均匀,不易因尾流扰动所产生的湍流而产生噪声,有效实现降噪。
Fluid propeller based on coanda effect
一种基于康达效应的流体推进器
2023-08-25
Patent
Electronic Resource
Chinese
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