Unlock instant, AI-driven research and patent intelligence for your innovation.

An internal cooling ribbed channel for the rear of the turbine blade

A channel and moving blade technology, applied in the direction of blade support components, engine functions, engine components, etc., can solve the problems of channel heat and mass transfer performance degradation

Active Publication Date: 2021-04-20
XI AN JIAOTONG UNIV
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a channel with inclined ribs, since the eddy current induced by inclined ribs decreases with the increase of the aspect ratio, the heat and mass transfer performance of the channel decreases with the increase of the channel aspect ratio

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An internal cooling ribbed channel for the rear of the turbine blade
  • An internal cooling ribbed channel for the rear of the turbine blade
  • An internal cooling ribbed channel for the rear of the turbine blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] combine Figure 3-5 , the present embodiment arranges intersecting ribs and continuous ribs respectively on the two wall surfaces of the rectangular cross-section channel 1 with an aspect ratio of 4:1; The intersecting cross ribs 3; the cross section of the inclined spoiler rib 2 is square, and the cross section of the cross rib 3 is rectangular; the rib height e of the inclined spoiler rib 2 1 =0.078D h ,D h is the hydraulic diameter of the rectangular cross-section channel 1, and the rib spacing P=10e. The section of the intersecting rib 3 is rectangular or square, and the length in the width direction is consistent with that of the inclined spoiler rib 2, which is e 1 , the length e in the height direction 2 =0.5e 1 . The cross ribs 3 equally divide the front wall.

[0036] combine Figure 2-5, in this embodiment, compared to the general 60° continuous rib channel, a cross rib 3 intersecting with it is arranged on the front wall, and the front wall is divided...

Embodiment 2

[0037] Embodiment 2: adopt the present invention at β=60 °, e 2 = e 1 =0.078D h , the channel direction angle is 45°, the number of rotations is 0.15, and the Reynolds number is 10000 under the rotation conditions of the comparative numerical calculation: the average Nusselt number ratio (0.986) of the front and rear walls of the present invention is compared to that of the inclined rib channel (0.949) 4% increase, 10% increase compared to general intersecting rib channel (0.896). In addition, the heat exchange capacity of the present invention is between the slanted rib channel with the same arrangement method as the present invention and the general intersecting rib channel. The arrangement of the inclined ribs in the three channels is the same, and the heat exchange capacity is enhanced under the rotation condition. However, the heat transfer uniformity of the oblique rib channel and the front and rear walls of the intersecting rib channel is poor, especially the heat tra...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an inner cooling ribbed channel for the rear part of a turbine rotor blade, which comprises: a channel with a rectangular cross-section, which is hollow inside, and is used for fluid to flow through; Flow ribs; the inclined spoiler ribs are arranged obliquely relative to the flow direction of the fluid; the center of the front wall of the rectangular cross-section channel is provided with cross ribs connecting the front wall with inclined spoiler ribs. Under the condition of rotation, the strong heat exchange area between the inclined fins is changed from one part to two parts through the intersecting ribs, the coverage area rises, and the heat transfer enhancement is more uniform. In addition, the intersecting rib structure and the inclined rib structure produce The secondary flow is greatly strengthened by the Coriolis force generated by the rotation, and the heat transfer capacity is further enhanced, and the difference in the arrangement of the fins on the front and rear walls can affect the secondary flow, effectively neutralizing the difference in heat transfer caused by the rotation of the front and rear walls, and improving the thermal efficiency. Stress, prolong blade life.

Description

technical field [0001] The invention belongs to the technical field of gas turbine blades, and in particular relates to an inner cooling ribbed passage used for the rear part of a turbine blade. Background technique [0002] Gas turbines are widely used in aeronautical propulsion, land power generation and other industrial equipment, and the development of turbine cooling technology plays a vital role in improving the thermal efficiency and output power of advanced high-temperature gas turbine engines. Spoiler-enhanced cooling is achieved by repeating the arrangement of spoiler ribs to create flow separation and then reattach a new boundary layer to the heat transfer surface, thereby enhancing heat transfer; in addition, the separated boundary layer enhances the mixing of the wall fluid with the main flow , the heat from the near wall can be more efficiently transferred to the main flow, thereby further enhancing the heat transfer. [0003] Han Jieqin et al. first studied t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F01D5/18
CPCF01D5/187F05D2260/221
Inventor 高铁瑜马彦达马晨曦鹿家麒
Owner XI AN JIAOTONG UNIV