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Title:
DYNAMIC FIVE-HOLE PROBE
Document Type and Number:
WIPO Patent Application WO/2018/205507
Kind Code:
A1
Abstract:
A dynamic five-hole probe, comprising a pressure-sensing part (1), a pressure-measuring hole transition section (2), a pressure-collecting section (3), dynamic pressure sensors (4) and soft-walled pressure-easing tubes (5), the pressure-sensing part (1) being provided with pressure-measuring holes (6), sensing a dynamic pressure component of airflow in three dimensions; the pressure-measuring hole transition section (2) transitions an inlet end surface five-hole structure into an outlet-end five-hole structure; the pressure-collecting section (3) has therein a pressure-measuring structure symmetrical about an identical center to a transition section cross-section, and pressure sensor mounting holes (8) in communication with the five pressure-measuring holes (6); the dynamic pressure sensors (4) are each mounted in a sensor mounting hole (8), and are used to measure dynamic pressure of airflow; the soft-walled pressure-easing tubes (5) are used to weaken cavity effects. The pressure sensing part (1) may have a diameter of 3 mm or less, and can ensure measurement range of airflow yaw angle and pitch angle are both no less than 30°; furthermore, the structural design of the pressure-measuring hole transition section (2) and the soft-walled pressure-easing tubes (5) effectively prevent dynamic signal distortion caused by cavity effects, ensuring dynamic frequency response of a probe.

Inventors:
WANG, Sichen (No. 11 Beisihuanxi Road, Haidian District, Beijing 0, 100190, CN)
DU, Juan (No. 11 Beisihuanxi Road, Haidian District, Beijing 0, 100190, CN)
LI, Fan (No. 11 Beisihuanxi Road, Haidian District, Beijing 0, 100190, CN)
TONG, Zhiting (No. 11 Beisihuanxi Road, Haidian District, Beijing 0, 100190, CN)
NIE, Chaoqun (No. 11 Beisihuanxi Road, Haidian District, Beijing 0, 100190, CN)
ZHANG, Hongwu (No. 11 Beisihuanxi Road, Haidian District, Beijing 0, 100190, CN)
Application Number:
CN2017/108562
Publication Date:
November 15, 2018
Filing Date:
October 31, 2017
Export Citation:
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Assignee:
INSTITUTE OF ENGINEERING THERMOPHYSICS, CHINESE ACADEMY OF SCIENCES (No. 11 Beisihuanxi Road, Haidian District, Beijing 0, 100190, CN)
International Classes:
G01M9/00; G01L11/00
Foreign References:
CN206725183U2017-12-08
CN107101798A2017-08-29
CN203053472U2013-07-10
CN206020457U2017-03-15
Other References:
LI, JICHAO ET AL.: "A Technique to Calibrate Cavity Effect in Unsteady Pressure Probes with High Frequency Response", JOURNAL OF AEROSPACE POWER, vol. 26, no. 12, 31 December 2011 (2011-12-31), pages 2749 - 2756
WANG, TAO ET AL.: "Construction and Calibration of Five-hole Probe", MODERN MACHINERY, no. 4, 31 December 2012 (2012-12-31), pages 19 - 22
DEMOS P. GEORGIOU: "Fabrication and calibration of a sub-miniature 5-hole probe with embedded pressure sensors for use in extremely confined and complex flow areas in turbomachinery research facilities", FLOW MEASUREMENT AND INSTRUMENTATION, vol. 39, 18 July 2014 (2014-07-18), pages 54 - 63, XP055612315
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (11/F, Bldg. DInternational Finance and Economics Center,No. 87, West 3rd Ring North Roa, Haidian District Beijing 9, 100089, CN)
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