SU460500A1 - Magnetohydrodynamic method of measuring the velocity vector of an electrically conducting fluid - Google Patents
Magnetohydrodynamic method of measuring the velocity vector of an electrically conducting fluidInfo
- Publication number
- SU460500A1 SU460500A1 SU1834643A SU1834643A SU460500A1 SU 460500 A1 SU460500 A1 SU 460500A1 SU 1834643 A SU1834643 A SU 1834643A SU 1834643 A SU1834643 A SU 1834643A SU 460500 A1 SU460500 A1 SU 460500A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- measuring
- velocity vector
- electrically conducting
- conducting fluid
- fluid
- Prior art date
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- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Description
1one
Известный магнитогидродинамический способ измерени вектора скорости электропроводной жидкости, заключающийс в создании магнитного пол в потоке жидкости и измерении индуктированного напр жени , обладает недостаточной точностью за счет того, что направление вектора скорости определ ют косвенно путем измерени двух взаимноперпендикул рных составл ющих скорости.The known magnetohydrodynamic method of measuring the velocity vector of an electrically conducting fluid, which involves creating a magnetic field in a fluid flow and measuring induced voltage, is not sufficiently accurate because the direction of the velocity vector is determined indirectly by measuring two mutually perpendicular velocity components.
Цель изобретени - устранение указанного недостатка.The purpose of the invention is to eliminate this drawback.
Дл этого в потоке создают вращающеес магнитное поле, плоскость вращени вектора магнитной индукции которого совмещают с плоскостью движени жидкости, и по направлению вектора магнитной индукции в момент прохождени индуктированного направлени через ноль определ ют направление вектора скорости движени жидкости.For this, a rotating magnetic field is created in the flow, the plane of rotation of the magnetic induction vector of which is aligned with the plane of motion of the fluid, and the direction of the velocity of motion of the fluid is determined by the direction of the magnetic induction vector when the induced direction passes through zero.
На чертеже представлена схема магнитогидродинамического преобразовател скорости , реализующего предлагаемый способ.The drawing shows a diagram of the magnetohydrodynamic transducer speed that implements the proposed method.
Преобразователь состоит из трех обмоток 1--3, оси которых сдвинуты на 120° и расположены в плоскости, параллельной плоскости движени жидкости. Обмотки заключены в диэлектрический корпус 4, на основании 5 которого , параллельном плоскости движени и контактирующем с жидкостью, размещены электроды: центральный 6 и периферийные 7.The converter consists of three windings 1--3, the axes of which are shifted by 120 ° and located in a plane parallel to the plane of motion of the fluid. The windings are enclosed in a dielectric case 4, on the basis of which 5, parallel to the plane of motion and in contact with the liquid, are placed electrodes: central 6 and peripheral 7.
Напр жение на обмотки подаетс от источ пика трехфазного тока 8. Величина и фаза напр жени , снимаемого с электродов, измер ютс измерительным прибором 9.The voltage on the windings is supplied from the source of a three-phase current peak 8. The magnitude and phase of the voltage taken from the electrodes are measured by the measuring device 9.
Вращающеес магнитное поле индуктирует в движущейс жидкости электрическое поле, вектор напр женности Е которого направлен по оси OZ, а величина его измен етс синусоидально во времени с угловой частотой со, равной угловой скорости вращени вектора магнитной индукции SQ.A rotating magnetic field induces an electric field in a moving fluid, the intensity vector E of which is directed along the OZ axis, and its magnitude varies sinusoidally with time with an angular frequency ω equal to the angular velocity of rotation of the magnetic induction vector SQ.
l/5cSm(), l / 5cSm ()
где К. - единичный вектор по оси OZ, V - модуль вектора скорости, Ф,- угол между вектором скорости и осьюwhere K. is the unit vector along the axis OZ, V is the modulus of the velocity vector, Ф, is the angle between the velocity vector and the axis
ОХ.OH.
Дл конкретного преобразовател разность потенциалов (например, между центральной и удаленной за пределы магнитного пол ) между двум точками на оси OZ пропорциональна скорости движени жидкости, а фаза напр жени проходит через ноль в момент совпадени направлени вектора магнитной индукции с направлением вектора скорости движени жидкости.For a particular converter, the potential difference (for example, between the central and remote out of the magnetic field) between two points on the axis OZ is proportional to the velocity of the fluid, and the voltage phase passes through zero at the time the magnetic induction vector coincides with the direction of the velocity of the fluid.
Периферийные электроды 7, установленныеPeripheral electrodes 7 installed
за пределами магнитного пол , эквипотенциальны с удаленной за пределы магнитного поoutside the magnetic field, equipotential with remote beyond the magnetic field
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1834643A SU460500A1 (en) | 1972-10-09 | 1972-10-09 | Magnetohydrodynamic method of measuring the velocity vector of an electrically conducting fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1834643A SU460500A1 (en) | 1972-10-09 | 1972-10-09 | Magnetohydrodynamic method of measuring the velocity vector of an electrically conducting fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU460500A1 true SU460500A1 (en) | 1975-02-15 |
Family
ID=20528772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1834643A SU460500A1 (en) | 1972-10-09 | 1972-10-09 | Magnetohydrodynamic method of measuring the velocity vector of an electrically conducting fluid |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU460500A1 (en) |
-
1972
- 1972-10-09 SU SU1834643A patent/SU460500A1/en active
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