SU603905A1 - Thermoanemometer inlet device - Google Patents

Thermoanemometer inlet device

Info

Publication number
SU603905A1
SU603905A1 SU762436166A SU2436166A SU603905A1 SU 603905 A1 SU603905 A1 SU 603905A1 SU 762436166 A SU762436166 A SU 762436166A SU 2436166 A SU2436166 A SU 2436166A SU 603905 A1 SU603905 A1 SU 603905A1
Authority
SU
USSR - Soviet Union
Prior art keywords
thermoanemometer
inlet device
inlet
flow
velocity
Prior art date
Application number
SU762436166A
Other languages
Russian (ru)
Inventor
Юрий Николаевич Лаптев
Сергей Иосифович Ровный
Юрий Алексеевич Фролов
Original Assignee
Волгоградский Политехнический Институт
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Волгоградский Политехнический Институт filed Critical Волгоградский Политехнический Институт
Priority to SU762436166A priority Critical patent/SU603905A1/en
Application granted granted Critical
Publication of SU603905A1 publication Critical patent/SU603905A1/en

Links

Description

one

The invention relates to the measurement of motion parameters and is intended to measure the velocity of flows moving at high speeds, for example, through pipelines, in the components of hydraulic machines. Thermo-anemometers are known for measuring the velocities of liquid media, in which I use semiconductor thermistors as a sensitive element. Due to the rapid loss of sensitivity of the thermistor to the speed of the liquid medium, the upper limit of the range of these devices is limited to a meter per second. This does not allow the use of semiconductor resistors in real hydraulic systems where speeds are sufficient several meters per second.

The range of measured velocities is considerably extended for a known hot-wire anemometer, the sensitive element of which is enclosed in a streamlined hollow head 2j. In the head there are inlet and outlet openings located along the axis of symmetry. The change in the velocity of the ambient medium, due to the expansion of the flow area, affects the heat transfer of the sensitive element less intensively.

This hot-wire anemometer responds to the position angle to the direction of flow, so its use in hydraulic systems, where both the magnitude and direction of the flow velocity (for example, a turbomachine) varies, can lead to unacceptable errors in determining the magnitude of the velocity.

The closest in technical essence to the present invention is a flow velocity meter comprising a cylindrical guide with an inlet made in the form of a confuser, and a sensing element, which make it possible to reduce the sensitivity to the angle of flow leakage h.

The purpose of the invention is to increase the accuracy, reliability of measurements and expand the range of measured speeds.

For this, the outlet of the cylindrical guide is made smaller than the inlet, and its diameter is chosen from the ratio

d –r, X 1 2

... out

gderh - diameter of the inlet; Sny diameter of the outlet. The insensitivity of the proposed thermoanemometer to the flow direction is due to the fact that the presence of the input

SU762436166A 1976-12-27 1976-12-27 Thermoanemometer inlet device SU603905A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU762436166A SU603905A1 (en) 1976-12-27 1976-12-27 Thermoanemometer inlet device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU762436166A SU603905A1 (en) 1976-12-27 1976-12-27 Thermoanemometer inlet device

Publications (1)

Publication Number Publication Date
SU603905A1 true SU603905A1 (en) 1978-04-25

Family

ID=20689077

Family Applications (1)

Application Number Title Priority Date Filing Date
SU762436166A SU603905A1 (en) 1976-12-27 1976-12-27 Thermoanemometer inlet device

Country Status (1)

Country Link
SU (1) SU603905A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317365A (en) * 1979-01-04 1982-03-02 Robert Bosch Gmbh Apparatus for the measurement of the mass of a flowing medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317365A (en) * 1979-01-04 1982-03-02 Robert Bosch Gmbh Apparatus for the measurement of the mass of a flowing medium

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