Propulsion System With Rotatable Member And Dual Nozzle
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Solution Overview
Problem
Conventional propulsion systems are inefficient in accelerating fluid molecules beyond initial inertia and pose risks to divers and living organisms due to damage from foreign objects, as they cannot effectively channel and direct fluid flow for enhanced thrust.
Innovation Solution
A propulsion system featuring a cylindrical support member with a tubular rotatable member and vanes that accelerates fluid flow, combined with a primary and secondary nozzle configuration to separate and direct liquid and vapor streams, increasing thrust by up to 400% through venturi effects and pressure expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional propeller is used to accelerate fluid molecules, then the propeller can perform work to overcome initial inertia, but the propeller cannot effectively accelerate fluid molecules beyond initial inertia due to fluid molecules tending to remain at rest
Solution Approach 1:
The propulsion system is divided into multiple functional components: an impeller for initial fluid acceleration, a diffuser for pressure recovery, and a nozzle for thrust generation. This segmentation allows each component to perform its specific function optimally, with the impeller overcoming initial inertia and the nozzle providing additional thrust through pressure differential
Solution Approach 2:
A working fluid (liquid or gas) is introduced as an intermediary between the impeller and the external environment. This intermediary fluid receives energy from the impeller, expands through the diffuser, and exits through the nozzle to generate thrust, enabling more efficient energy transfer than direct propeller-to-air interaction
2Productivity
If screw-type propulsion systems are used, then propulsion function is achieved, but the systems pose danger to divers and living organisms and are easily damaged by foreign objects
Solution Approach 1:
The propulsion system uses a closed shell structure that encloses the impeller and working fluid. This shell contains the high-speed rotating components and working fluid, preventing direct contact with external organisms while allowing the system to generate thrust through controlled fluid ejection
Solution Approach 2:
The system replicates biological propulsion mechanisms found in nature, such as the jet propulsion used by squid and octopuses, which eject water through a mantle cavity to move forward. This biomimetic approach achieves propulsion without exposed mechanical parts that could harm marine life
3Productivity
If conical enclosures or nozzles are used to channel fluid flow to propeller, then propulsion efficiency is increased, but the complexity of the system increases
Solution Approach 1:
The diffuser and nozzle functions are merged into a single integrated component structure. The diffuser section gradually expands to recover pressure, while the nozzle section tapers to accelerate flow and generate thrust. This merging reduces the number of separate parts while maintaining efficient fluid channeling
Solution Approach 2:
The working fluid serves multiple functions: it acts as a medium for energy transfer from the impeller, provides pressure recovery in the diffuser, and generates thrust through nozzle ejection. This multi-functionality reduces system complexity by eliminating the need for separate systems for each function
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 system enhances propulsion efficiency by accelerating fluid flow and containing high-pressure liquid and vapor, resulting in increased thrust and reduced turbulence, while minimizing damage risks from foreign objects.
Implementation Method 1
A venturi section may be attached to a downstream end of the support member and accelerate the fluid flow there through
Implementation Method 2
The primary nozzle may define first, second and third sections extending along a longitudinal direction of the primary nozzle. The second section may taper inwardly in a direction toward the central longitudinal axis
Implementation Method 3
a blade which extends in a direction toward a rotational axis of the rotatable member such that rotation of the tubular member and the vane attached thereon draws fluid into the tubular member to accelerate the fluid flow
Data Source
AI summary
A propulsion system may include a cylindrical support member and a tubular rotatable member rotatably mounted within the support member that may be adapted to permit fluid flow therethrough. The tubular rotatable member may extend past a down stream end of the support member. An exemplary embodiment of a propulsion system may also disclose a vane attached on an interior surface of the tubular member and may include a blade which extends in a direction toward a rotational axis of the rotatable member such that rotation of the tubular member and the vane attached thereon draws fluid into the tubular member to accelerate the fluid flow through the tubular member. Additionally, a nozzle may be attached to the down stream end of the support member and include a primary nozzle and a secondary nozzle within the primary nozzle. The secondary nozzle may be engaged with the primary nozzle by a stator.