Golf Club Head Vortex Generators for Drag Reduction
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Solution Overview
Problem
Golf club heads experience significant drag due to laminar flow separation, leading to reduced swing speeds, as existing designs often result in high drag coefficients and pressure drag forces, especially at subcritical Reynolds numbers.
Innovation Solution
Incorporation of tripping structures on the hosel and aerodynamic shaping of the golf club head, including vortex generators on the crown and sole, to transition from laminar to turbulent flow, reducing closure angles and drag forces, and using a combination of materials and manufacturing processes for precise feature integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional golf club head designs are used, then manufacturing is simpler, but drag force increases due to laminar flow separation
Solution Approach 1:
The patent applies parameter changes by modifying the closure angle of the club head to be less than 15 degrees, transitioning the flow regime from laminar to turbulent. This angle parameter optimization reduces pressure drag by delaying flow separation, directly addressing the drag force issue while maintaining a relatively simple structural implementation.
Solution Approach 2:
The patent segments the club head structure into distinct functional zones: a closure portion with the optimized angle, a skirt portion extending rearward, and a boat tail portion. This segmentation allows each zone to perform its specific aerodynamic function independently, reducing overall drag while keeping individual components manufacturable.
2Force
If club head closure angle is reduced to reduce drag, then aerodynamic performance improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a closure angle of less than 15 degrees, which is a partial optimization rather than requiring extreme precision. This threshold-based approach provides sufficient aerodynamic benefit while allowing broader manufacturing tolerances, avoiding the need for excessively tight angle controls that would significantly increase manufacturing complexity and cost.
3Speed
If vortex generators are added to the club head, then flow transition from laminar to turbulent is enhanced, but device complexity increases
Solution Approach 1:
The patent places vortex generators at specific locations on the club head surface rather than distributing them uniformly. This localized placement strategy enhances flow transition effectiveness at critical positions while minimizing the total number of vortex generators needed, thereby reducing overall device complexity compared to comprehensive coverage approaches.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in increased club head speed and distance, with improved aerodynamic properties by reducing pressure drag and maintaining compliance with USGA regulations, enhancing the performance of golf club heads.
Implementation Method 1
a plurality of vortex generators positioned in at least one of: an aft half of the sole or an aft half of the crown
Implementation Method 2
to transition from laminar to turbulent flow, reducing closure angles and drag forces
Implementation Method 3
Golf club heads experience significant drag due to laminar flow separation, leading to reduced swing speeds
Implementation Method 4
Golf club heads experience significant drag due to laminar flow separation
Data Source
AI summary
Golf club heads with improved aerodynamic properties. The golf club head may include a striking face, a sole, a crown, and a plurality of vortex generators positioned in an aft half of the sole or an aft half of the crown. The vortex generators may be positioned on an inlay that is received by a recess of the crown or the sole. The inlay may be manufactured separately from the remainder of the club head body, such as the crown and the sole.