Dynamic entropy probe

A probe and dynamic technology, applied in the field of dynamic entropy probes, can solve the problems of easy contamination of hot wires, easy breakage, high airflow sensitivity, etc., and achieves low airflow angle sensitivity, reduced difficulty and cost, and high spatial resolution. rate effect

Active Publication Date: 2014-09-17
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
View PDF6 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the angle sensitivity of the probe is limited, the maximum can only reach ±12°, and it cannot be applied to the flow field with a large angle
The probe has a limited frequency response and cannot capture high-frequency signals
In addition, the hot wire is susce

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
  • Dynamic entropy probe
  • Dynamic entropy probe
  • Dynamic entropy probe

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail in conjunction with specific embodiments and with reference to the accompanying drawings.

[0040] The principle and design of the entropy probe mainly include: the dynamic total pressure probe technology developed by the applicant's research team, the static pressure hole, two high-response Kulite pressure sensors and the hot wire anemometer technology, and simultaneously measure the dynamics in the flow field The total pressure, the static pressure of the flow channel inside the probe and the Ma number are calculated to obtain the total temperature, and finally the entropy.

[0041] The working principle of the probe is:

[0042] The entrance of the Kiel fairing is chamfered, and four axisymmetric holes are opened on the rear wall. The Kiel fairing is the main structure of the probe head. Its purpose is to red...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
The inside diameter ofaaaaaaaaaa
Outer diameteraaaaaaaaaa
Login to view more

Abstract

Disclosed in the invention is a dynamic entropy probe comprising a rectifying cover, a static vent, a first high-frequency response pressure sensor, a hotline hole, a total pressure tube, a rectifying cover hole, a pressure guiding tube, a second high-frequency response pressure sensor, a pressure sensor support, a hotline, a hotline support and a semi-infinite long flexible tube. According to the dynamic entropy probe, the flowing total pressure, static temperature and velocity can be measured dynamically, thereby obtaining the local entropy. Because the obtained entropy is the physical parameter for measuring the most reasonable internal flowing loss, the weight on the efficiency influence by the nonsteady flow loss and even the internal flow loss of the turbomachinery can be analyzed in a quantitative mode.

Description

technical field [0001] The invention relates to the technical field of unsteady flow field measurement and turbomachinery measurement, in particular to a dynamic entropy probe suitable for dynamic measurement of three-dimensional unsteady flow field. Background technique [0002] Entropy is the most reasonable quantity to measure flow irreversibility or loss, because it can intuitively analyze the weight of each flow loss on efficiency, and has nothing to do with the reference frame. Although great progress has been made in research to understand the mechanism of unsteady loss, the current understanding of dynamic entropy is still incomplete. One of the reasons is the lack of accurate measurement of dynamic entropy. [0003] The flow in turbomachinery is very complicated, and the measurement of entropy is relatively rare. Only a few people in the world have tried and succeeded. Ng and Epstein were the first to measure the entropy in a transonic compressor using a double hot...

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
IPC IPC(8): G01M9/06
Inventor 杨林王偲臣李继超林峰
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap