Gas Turbine Cooling Fluid Guide for Uniform Stator Vane Cooling

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Solution Overview

Problem

There is a variation in the amount of cooling fluid supplied and cooling effect between gas turbine stator vanes due to the uneven distribution from the cooling fluid supply holes, leading to inconsistent cooling performance across the vanes.

Innovation Solution

A gas turbine cooling fluid guide is introduced, comprising a fixed portion and a first guide portion that covers the cooling fluid supply hole, guiding the cooling fluid to uniform the distribution and reduce collisions with accessory components, thereby minimizing vibration and damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If cooling fluid is supplied from cooling fluid supply hole to gas turbine stator vane, then cooling effect is achieved, but variation in cooling effect occurs between plurality of stator vanes

Engineering Contradiction:

Improvecooling effectVSAvoiduniformity of cooling effect

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The cooling fluid supply system is segmented into multiple supply holes distributed around the circumference of the turbine casing, rather than relying on a single supply hole. This segmentation allows cooling fluid to be delivered to multiple stator vanes more evenly, reducing the variation in cooling effect between different vanes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the turbine casing are equipped with cooling fluid supply holes at strategically located positions to address local cooling requirements. By optimizing the distribution of supply holes around the circumference, the system achieves more uniform cooling across different stator vanes while maintaining effective temperature control in each local region.

Inventive Principle:

Principle #3Local quality

2Temperature

If cooling fluid is supplied directly to stator vane, then cooling is provided, but collision with accessory components causes vibration and damage

Engineering Contradiction:

Improvecooling provisionVSAvoidvibration and damage to accessory components

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

A guide portion is introduced as an intermediary component between the cooling fluid supply hole and the stator vane accessory components. This guide portion redirects the cooling fluid flow away from direct collision with accessory components, thereby reducing vibration and damage while maintaining effective cooling of the stator vane.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The guide portion utilizes the kinetic energy and flow direction of the cooling fluid to redirect it along beneficial paths that avoid harmful collisions. By strategically designing the guide portion geometry, the system converts what would be harmful direct impacts into controlled flow patterns that provide cooling without causing vibration or damage to accessory components.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 suppresses variations in cooling effect and reduces damage to accessory components by stabilizing fluid flow and minimizing vibration transmission.

Implementation Method 1

a first guide portion that covers at least a portion of the cooling fluid supply hole when viewed from an inside of the gas turbine in a radial direction along a direction of an axis line of the cooling fluid supply hole

Methodology Applied

Scientific EffectFluid flow guidance:

Implementation Method 2

The guide suppresses variations in cooling effect and reduces damage to accessory components by stabilizing fluid flow and minimizing vibration transmission

Methodology Applied

Scientific EffectFlow stabilization:

Implementation Method 3

a cooling fluid supply hole for supplying the cooling fluid to the plurality of turbine stator vanes is formed

Methodology Applied

Scientific EffectHeat transfer:

Data Source

PatentUS20260063050A1Cooling fluid guide for gas turbine and gas turbine

Publication Date: 2026.03.05 MITSUBISHI HEAVY IND LTD

AI summary

The present invention provides a cooling fluid guide for a gas turbine, the cooling fluid guide comprising: a fixed part to be fixed either to piping for supplying a cooling fluid to a cooling fluid supply hole in a turbine casing or to the turbine casing; and a first guide part configured to cover at least a portion of the cooling fluid supply hole when viewed along the axial direction of the cooling fluid supply hole from the inside of the gas turbine in the radial direction in a state in which the fixed part is fixed to the piping or the turbine casing.