Air foil with vortex generators专利检索-失速控制风能专利检索查询-专利查询网

Air foil with vortex generators

阅读：909发布：2022-02-19

专利汇可以提供Air foil with vortex generators专利检索，专利查询，专利分析的服务。并且A sail is provided with short rows of closely spaced holes, with the axes of the rows converging and being inclined at an acute angle to the path of the free air past the sail. The converging ends of individual rows are relatively widely spaced and the rows are arranged in an array from the head to the foot of the sail. The angle between the axis of each row of holes and the direction of the free air flow path is alternated along the array from a positive to negative angle. The rows of holes, in turn, produce a row of discrete air jets on the convex, low pressure side of the sail, forming angled aerodynamic ''''fences.'''' These fences present a partial obstruction to the flow of the free air past the sail, causing the air to form twisted streams when spilling over the aerodynamic fences. These streams form continuous, helical trailing vortices that mix the free air stream with the slower moving boundary layer of air next to convex surface of the sail. The resulting mixing action continually re-energizes the boundary layer of air, thus preventing stall and improving the driving force of the sail. The principle is also useful in the control of parachutes and other thin air foils.，下面是Air foil with vortex generators专利的具体信息内容。

权利要求

1. A thin air foil such as a sail or the like of the type having apertures thereon to improve its aerodynamic effectiveness; the improvement wherein said apertures are formed in discrete rows of three or more apertures with each row providing an aerodynamic fence of small air Jets that produces a trailing vortex, said rows of apertures being formed in an elongated array the axis of the array being generally normal to the free air stream flowing along the foil, the axes of said rows being at acute angles to the free air stream, said rows of apertures being spaced along the array axis by a distance sufficient to present a gap to the air stream that is not substantially less than the extent of one of said rows as measured along the axis of the array.

2. The air foil of claim 1, wherein the rows of apertures in said array are disposed in zig-zag fashion.

3. The air foil of claim 1, whereby there are at least four apertures in each row.

4. The air foil of claim 1, wherein the angle of inclination of the rows of apertures to the array axis and the angle of inclination of the array axis to the air stream are selected so that during normal operation of the air foil the angle of inclination of the rows to the air stream is about 20 degrees.

5. The air foil of claim 4, wherein said rows of apertures are arranged in zig-zag formation along the array axis.

6. The airfoil of claim 5, wherein the air foil is a fore and aft sailboat sail, and the array axis extends along the luff of the sail.

7. The sail of claim 6, wherein the array axis is inclined from the mast axis at a positive acute angle.

8. The sail of claim 7, wherein said positive acute angle of inclination is about 10*.

9. The sail of claim 6, wherein the diameter of the holes is about 1/2 to 1 inch, the diameter increasing with the height of the sail.

10. The air foil of claim 2, wherein said air foil is a parachute, and the zig-zag array of holes extends circumferentially adjacent the lower edge of the parachute.

11. A fore and aft sail boat sail of the type having apertures thereon to improve its aerodynamic effectiveness; the improvement wherein said apertures are formed in discrete rows of three or more apertures with each row providing an aerodynamic fence of small air jets that produces a trailing vortex, said rows of apertures being formed in a zig-zag array near the luff of the sail, the axes of the individual rows of holes being at acute angles to the array axis, the rearwardly converging ends of said rows of apertures being spaced along the array axis by a distance such that the rearwardly converging ends of the rows of holes present a gap to the air stream that is not substantially less than the extent of one of said rows as measured along the axis of the array.

12. The air foil of claim 11, whereby there are at least four apertures in each row.

13. The sail of claim 11, wherein the angle of inclination of the rows of apertures to the array axis and the angle of inclination of the array axis to the air stream are selected so that during normal operation of the air foil the angle of inclination of the rows to the free air stream is about 20*.

14. The sail of claim 13, wherein the axis of the array is inclined to that of the mast at a small positive acute angle of compensate for heeling of the boat.

15. The sail of claim 11, wherein the gap between the rearwardly converging ends of the rows of holes is about equal to the axial length of an individual row.

16. The sail of claim 11, wherein the diameter of each hole is about 1/2 to 1 inch, depending on the height of the sail.

说明书全文

相关专利内容

标题	发布/更新时间	阅读量
一种低噪声风力机叶片设计方法及低噪声风力机叶片	2020-05-12	792
一种基于窗口决策的高容错性的天钩回收方法	2020-05-08	563
一种带有仿生锯齿尾缘结构的跨音速压气机平面叶栅	2020-05-11	674
一种新型仿生水下双足游走机器人及其运动方法	2020-05-11	405
一种用于开颅手术的机械臂末端稳定装置	2020-05-11	489
一种提升机防坠落装置	2020-05-13	55
井下快速定向瞄准的地面自动控制装置及方法	2020-05-13	693
一种自升式海洋平台升降防滑保护检测系统及方法	2020-05-14	434
一种电动汽车风力发电系统	2020-05-14	507
车辆驱动装置	2020-05-08	951

高效检索全球专利

专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。

我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。

申请试用

分析报告

专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。

申请试用

失速控制热门专利

热门分类

Air foil with vortex generators

该功能需要专业版企业版VIP权限，您可以：