Turbine Blade Riblet Coating for Heat and Drag Reduction
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Solution Overview
Problem
Turbine blades experience high temperatures due to fluid contact, leading to increased resistance and potential damage, and existing technologies struggle to effectively reduce this resistance and enhance durability.
Innovation Solution
A turbine blade design featuring a base member with a heat-resistant layer and a riblet structure, where grooves of varying pitches and depths are formed on the surface to minimize fluid resistance and enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat resistant layer is formed on the turbine blade, then heat resistance is improved, but fluid resistance increases
Solution Approach 1:
The patent applies local quality by creating grooves with different pitches and depths at different locations on the heat resistant layer. The first grooves have a first pitch and the second grooves have a second pitch, with at least one pitch value being different. This local variation in groove characteristics optimizes fluid resistance reduction while maintaining the heat resistant layer's thermal protection function.
2Object-affected harmful factors
If grooves are formed on the heat resistant layer, then fluid resistance is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent employs a beam irradiation apparatus that uses energy beams (such as laser beams) to form grooves on the heat resistant layer. This replaces traditional mechanical machining methods, enabling precise control over groove pitch and depth while reducing manufacturing complexity. The beam irradiation method can create complex groove patterns efficiently without mechanical tool wear or setup complexity.
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 design reduces fluid resistance and enhances the durability of turbine blades by minimizing heat transfer and stress, improving the efficiency and longevity of the blades.
Implementation Method 1
a beam irradiation apparatus that is configured to irradiate a surface of a coat layer, which is formed on a base member and on which a plurality of second grooves are formed, with an energy beam
Data Source
AI summary
A blade is used in fluid and includes: a base member; and a coat layer that is formed on the base member, a plurality of first grooves and a plurality of second grooves are formed on a surface of the coat layer, a pitch of the plurality of first grooves is different from a pitch of the plurality of second grooves.