Retrofitted Add-On Kit for Aerodynamic Drag Reduction
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Solution Overview
Problem
Current aerospace systems face significant limitations in aerodynamic drag reduction, with existing methods providing only marginal improvements and being unsuitable for integration with existing systems, leading to suboptimal performance and design compromises due to volume constraints for payload.
Innovation Solution
A retrofitted add-on kit or inbuilt device that alters the aerodynamic shape of aerospace vehicles and injects hot gases or fluids into the airflow to reduce drag, utilizing shape optimization and heat/energy addition, with fuels and propellants selected for auto-ignition and high-temperature gas generation to minimize drag through various injection methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing drag reduction techniques are applied to current aerospace systems, then marginal improvement in performance is achieved, but the systems remain unsuitable for integration with existing vehicles and design compromises persist
Solution Approach 1:
The invention divides the drag reduction system into separate functional modules: a nose cone component with specific contour geometry and a base bleed system with gas generator and discharge outlets. This segmentation allows the components to be independently optimized and retrofitted onto existing aerospace vehicles without requiring complete system redesign, thereby improving both performance and adaptability.
Solution Approach 2:
The base bleed system is nested within the nose cone structure, with the gas generator and fuel reservoir integrated into the nose cone body. This nested configuration reduces overall system volume, eliminates the need for separate external components, and enables easy integration with existing vehicles while maintaining aerodynamic efficiency.
2Productivity
If specialized low-drag shells like EFRB or HVP are used, then aerodynamic performance is improved, but the systems become completely different designs not suitable for existing infrastructure
Solution Approach 1:
The invention applies local quality modifications to existing shells by adding a specifically contoured nose cone and base bleed system rather than redesigning the entire shell. The nose cone contour is optimized for minimal drag while the base bleed system addresses wake region pressure drag locally, allowing existing shell bodies to be used without modification while achieving superior aerodynamic performance.
Solution Approach 2:
The nose cone acts as an intermediary component between the existing shell body and the airflow, providing the optimized aerodynamic shape without requiring changes to the underlying shell structure. This intermediary approach enables existing shells to achieve low-drag performance through attachment of the contoured nose cone and base bleed system.
3Length of moving object
If Rocket Assisted Projectile shells are equipped with rockets to increase range, then range is improved, but payload capacity is reduced due to increased bulk
Solution Approach 1:
The invention merges the base bleed system with the nose cone structure, combining the gas generator, fuel reservoir, and discharge mechanisms within the nose cone volume. This integration eliminates the need for separate external rocket motors and fuel tanks, reducing overall system bulk while maintaining range extension capability through aerodynamic optimization and controlled gas discharge in the wake region.
Solution Approach 2:
The invention changes the physical parameters of the nose cone (contour geometry, volume, surface area) to optimize aerodynamic performance and reduce drag. By modifying these geometric parameters, the system achieves extended range without proportionally increasing volume, thereby preserving payload capacity while improving ballistic performance.
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
Significantly reduces aerodynamic drag, enhancing performance metrics such as range, speed, and fuel efficiency, making existing and future aerospace systems more capable without the need for new designs or technologies like Base-Bleed or Hyper Velocity Projectiles.
Implementation Method 1
The hollow structure is configured to be attached with the airborne vehicle to alter an external profile of the airborne vehicle to change a shape of the airborne vehicle to provide a minimum aerodynamic drag
Implementation Method 2
The one or more nozzles are configured for injecting the one or more gases/fuels/compounds/substances into an upcoming air-flow in the neighbourhood of the airborne vehicle. The one or more fuels/hot gases/fluids are injected to deposit energy/heat/fluid in the neighbourhood of the airborne vehicle
Implementation Method 3
The one or more fuels/hot gases/fluids are injected to deposit energy/heat/fluid in the neighbourhood of the airborne vehicle to achieve further aerodynamic drag reduction
Implementation Method 4
The hollow structure is filled with one or more fuels/propellants/oxidizers/compounds/substances... that are selected from a group consisting of a gas, a vapour, a liquid, particulate aerosol, solid, and a mixture thereof
Implementation Method 5
fuels and propellants selected for auto-ignition and high-temperature gas generation
Data Source
AI summary
The embodiments herein disclose a retrofitted or in built or add-on kit/device for airborne vehicles to reduce the aerodynamic drag thereby increasing performance parameters/metrics of the vehicles. Drag reduction is achieved through shape/contour optimization, and/or heat/energy/fluid addition to the flow in neighbourhood of the vehicle. The device is designed with an external surface to offers the minimum drag. The device is configured to deposit heat/energy/fluid in neighbourhood of flying vehicle in several ways by generating/injecting hot gases in neighbourhood of vehicle for energy/heat addition, thereby causing maximum drag reduction. Heat/energy/fluid is added through the nozzles in the add-on kit/device.