Golf Club Head Turbulators for Drag Reduction
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Solution Overview
Problem
Golf club heads experience increased drag due to flow separation, which reduces the speed of the club and subsequently the golf ball, as air flow detaches from the surface and forms eddies and vortices, leading to pressure differential and drag issues.
Innovation Solution
Incorporating turbulators on the golf club head, specifically on the crown and sole, which create turbulence in the boundary layer to delay flow separation, reducing drag by energizing the air flow and maintaining attachment over a longer distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the golf club head has a smooth surface, then manufacturing is easier, but flow separation occurs earlier causing increased drag
Solution Approach 1:
The patent applies local quality by creating turbulators only in specific regions where flow separation is most problematic, rather than modifying the entire surface. The turbulators are positioned strategically on the crown and sole of the club head to energize the boundary layer where it is most needed, maintaining smooth surfaces elsewhere for ease of manufacture.
Solution Approach 2:
The patent converts the harmful effect of flow separation into a benefit by using controlled turbulence generated by turbulators. The turbulence creates favorable pressure gradients that delay flow separation and reduce drag, transforming what would normally be a harmful phenomenon into a useful mechanism for improving aerodynamic performance.
2Object-affected harmful factors
If turbulators are added to the club head, then drag is reduced by delaying flow separation, but device complexity increases
Solution Approach 1:
The turbulators are implemented as localized features rather than a comprehensive surface modification system. By concentrating turbulence-generating elements only in critical flow separation zones, the patent achieves drag reduction with minimal added complexity.
Solution Approach 2:
The patent optimizes turbulator parameters such as height, spacing, and positioning to achieve effective drag reduction with the simplest possible configuration. By carefully selecting these parameters, the design achieves maximum aerodynamic benefit with minimal structural complexity.
3Loss of energy
If the boundary layer remains laminar, then energy loss is lower, but flow separation occurs earlier increasing drag
Solution Approach 1:
The patent deliberately induces turbulence in the boundary layer using turbulators, converting what is normally considered an energy-loss mechanism into a beneficial effect. The turbulence energizes the boundary layer, creating favorable pressure gradients that delay flow separation and ultimately reduce overall energy loss through drag reduction.
Solution Approach 2:
The patent changes the flow regime parameter from laminar to turbulent in specific regions by introducing turbulators. This parameter change transforms the boundary layer characteristics to delay separation, achieving net energy savings despite the local increase in turbulent dissipation.
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 implementation of turbulators reduces aerodynamic drag, increases club head speed, and enhances ball speed by delaying boundary layer separation, resulting in improved performance during the golf swing.
Implementation Method 1
turbulators on the golf club head, specifically on the crown and sole, which create turbulence in the boundary layer to delay flow separation
Implementation Method 2
viscous forces near the surface of the club head create a velocity gradient from the surface to the free stream region. Accordingly, air flow velocity near the surface may be relatively slow and gradually increases toward the free stream velocity
Implementation Method 3
Flow separation occurs when the boundary layer travels on the golf club head far enough against an adverse pressure gradient that the air flow velocity in the boundary layer relative to the surface of the club head falls almost to zero
Implementation Method 4
Flow separation occurs when the boundary layer travels on the golf club head far enough against an adverse pressure gradient that the air flow velocity in the boundary layer relative to the surface of the club head falls almost to zero
Data Source
AI summary
A golf club head includes a crown surface having an apex at a highest point and extending between the face, the rear, the heel and the toe of the golf club head. The golf club head also includes a plurality of crown turbulators projecting from the surface of the crown and located between the face and the apex, wherein each adjacent pair of crown turbulators is separate and spaced apart to define a space between the adjacent pair of crown turbulators.