Rotary Engine Cooling Guide Vane for Rotor Core
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Solution Overview
Problem
Conventional rotary engine cooling systems face inefficiencies due to reinforcing ribs blocking airflow and generating heat vortices, which prevent effective cooling of the rotor core and its assemblies, leading to potential heat stress and reduced engine life.
Innovation Solution
An internal cooling passage structure with a guide vane is introduced to reduce vortices at rotor core cooling openings, allowing more cooling air to enter the rotor core passages, enhancing heat dissipation and engine efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcing ribs are mounted on the cooling channel, then structural strength is improved, but cooling air flow is blocked and heat dissipation efficiency deteriorates
Solution Approach 1:
The cooling channel is segmented into multiple passages with different functions: outer cooling channels for heat dissipation and inner rotor core passages for core cooling. The guide vane segments the airflow path, directing cool air preferentially to the rotor core passages while allowing the outer channels to handle heat rejection, thus resolving the conflict between structural reinforcement and cooling efficiency
Solution Approach 2:
The guide vane acts as an intermediary element that mediates between the cooling air source and the rotor core passages. It redirects the airflow to eliminate blockage effects and ensures efficient heat dissipation from the rotor core, thereby maintaining both structural integrity and cooling performance
2Device complexity
If cooling channel design allows heat vortex phenomenon, then air flow path is simplified, but cooling air cannot enter rotor core and temperature cannot be exhausted
Solution Approach 1:
The guide vane is positioned upstream to preliminarily redirect the cooling air flow before it enters the rotor core passages. This preliminary action prevents the formation of heat vortices and ensures that cool air is properly directed into the rotor core, eliminating the need for complex passage designs while maintaining high cooling efficiency
Solution Approach 2:
The guide vane employs curved surfaces to smoothly redirect airflow, eliminating sharp edges that would generate vortices. The curved geometry guides air flow along smooth paths into the rotor core passages, preventing turbulence and heat vortex formation while maintaining simple channel design
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 guide vane design improves cooling air mass flow, effectively lowering rotor temperature and enhancing engine operation stability and lifespan by reducing blockages and heat vortex phenomena.
Implementation Method 1
a guide vane in the front frame diminishes the vortices generated at the core cooling passage inlets
Implementation Method 2
the cooling air goes through the rotor core cooling passage to the rear frame openings
Implementation Method 3
enhancing heat dissipation and engine efficiency
Data Source
AI summary
An internal cooling passage structure for rotary engine, which includes a rotary engine body, having a front frame, a mid-frame, a rear frame and a rotor, wherein the rotor has cooling passages beneath the rotor triangular apexes, and both front and rear frames respectively have corresponding openings; a rotor, rotating in the mid-frame, having the core cooling passages in full or partial connection with the openings in both front and rear frames in the engine operation; and a guide vane along the opening edge, wherein external air is guided into the rotor core cooling passages by the guide vane which avoids generating heat vortices and helps to increase the cooling air so as to lower the temperature on the rotor and its assemblies.