Flow Roller Device for Vehicle Drag Reduction
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Solution Overview
Problem
Existing moving surface boundary layer control methods for vehicles are inefficient in reducing air and water resistance, leading to increased fuel consumption and emissions.
Innovation Solution
A flow roller device with a series of elongated rotating bodies and intermediate vanes arranged to form a roller array, which rotates and moves with airflow to minimize drag by creating an undulating surface that maintains continuous airflow, reducing friction and turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional fixed surfaces are used on vehicles, then structural simplicity is maintained, but air and water resistance increases leading to higher fuel consumption
Solution Approach 1:
The patent applies the dynamics principle by transforming fixed surfaces into moving surfaces. The conveyor belt system continuously moves across the vehicle surface in the direction of fluid flow, creating a dynamic boundary layer control mechanism that reduces skin friction drag without requiring complex structural changes to the vehicle itself
Solution Approach 2:
The patent utilizes fluid dynamics principles by employing a conveyor belt system that interacts with the boundary layer of air or water flowing over the vehicle. The moving surface modifies the boundary layer characteristics, reducing turbulence and drag forces from the surrounding fluid
2Loss of energy
If moving surface boundary layer control methods are implemented, then air and water resistance is reduced, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the vehicle surface into multiple zones, each equipped with independent conveyor belt segments. This allows the boundary layer control to be applied selectively to different areas of the vehicle, optimizing drag reduction while managing system complexity through modular deployment
Solution Approach 2:
The conveyor belt system serves multiple functions: it reduces skin friction drag, controls the boundary layer, and can be applied to various vehicle types (aircraft, automobiles, ships). This multi-functionality justifies the added device complexity by providing broad applicability and versatile performance
3Loss of energy
If conveyor belt surfaces are used to reduce friction, then drag is minimized, but manufacturing complexity increases compared to fixed surfaces
Solution Approach 1:
The patent employs thin film conveyor belt materials that can be easily manufactured and installed on vehicle surfaces. These flexible thin films conform to the underlying structure while providing the moving surface effect, simplifying manufacturing compared to rigid moving surface alternatives
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 flow roller device significantly reduces air and water resistance, conserving fuel, lowering emissions, and improving energy efficiency in vehicles by minimizing drag and optimizing airflow.
Implementation Method 1
moving surface boundary layer control methods
Implementation Method 2
the flow is accelerated across the surface moving in the same direction to produce a lesser pressure
Implementation Method 3
decreases air friction
Implementation Method 4
produce a lesser pressure, and retarded across the surface moving in the opposite direction to produce a greater pressure. The net result is a force urging the plane toward the surface moving in the direction of ambient fluid flow
Data Source
AI summary
The present invention flow rollers are a moving surface boundary layer control method that can reduce surface friction in, automobiles, aircrafts, ships, high speed trains, launch vehicles, sound barriers, temperature barriers, and housings. In a moving surface airflow control system, a flow roller device for mounting on a vehicle for reducing fluid resistance has a first elongated rotating body mounted on a first axis of rotation. The first axis of rotation defines a first forward portion and a first rear portion. The first forward portion is in front of the first axis of rotation, and the first rear portion is behind the first axis of rotation. The first forward portion is configured to move with the fluid flow in a direction along a longitudinal midline and rotate with the airflow.