SU1651100A1 - Method of defining water flow rate and its volume in measuring flume - Google Patents
Method of defining water flow rate and its volume in measuring flume Download PDFInfo
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- SU1651100A1 SU1651100A1 SU884632727A SU4632727A SU1651100A1 SU 1651100 A1 SU1651100 A1 SU 1651100A1 SU 884632727 A SU884632727 A SU 884632727A SU 4632727 A SU4632727 A SU 4632727A SU 1651100 A1 SU1651100 A1 SU 1651100A1
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- flow
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Abstract
Изобретение относитс к гидрометрии и может быть использовано в , гидрометрических лотках дл определени расходов воды в открытых руслах и каналах. Целью изобретени вл етс повышение точности определени расхода и количества воды гидрометрическими лотками. Дл определени расхода , проход щего через гидрометрический лоток, выбирают измерительный участок в зоне с критическим и сверхкритическим течением. Измер ют в нем среднюю скорость, по которой суд т о расходе, а количество жидкости определ ют путем интегрировани измеренной скорости по времени.сThe invention relates to hydrometry and can be used in hydrometric trays to determine the flow of water in open channels and canals. The aim of the invention is to improve the accuracy of determining the flow rate and amount of water by hydrometric trays. To determine the flow rate passing through the pressure pan, a measuring section is selected in the zone with critical and supercritical flow. It measures the average rate at which flow is judged, and the amount of fluid is determined by integrating the measured velocity over time.
Description
(Л(L
сwith
Изобретение относитс к гидрометрии и может быть использовано в гидрометрических лотках дл определени расходов воды в открытых руслах и каналах.The invention relates to hydrometry and can be used in hydrometric trays to determine the flow of water in open channels and canals.
Целью изобретени вл етс повышение точности определени расхода и количества воды гидрометрическими лотками.The aim of the invention is to improve the accuracy of determining the flow rate and amount of water by hydrometric trays.
Способ осуществл етс следующим образом.The method is carried out as follows.
Дл определени расхода воды на за- заданном участке лотка с критическим или сверхкритическим течением измер ют среднюю скорость потока при свободном истечении, котора вл етс пр мым параметром определю щим расход в соответствии с известным из гидравлики уравнением О Ащ-v, где AQ - живое сечение потока; V - средн скорость потока. Причем живое сечение потока в гидрометрическом лотке при заданном режиме истечени за- |висит от конструкции лотка и средней скорости движени жидкости. Так, если используютс лотки, в горловине которых обеспечиваетс критический и Сверхкрйтическии режимы течени , то расход дл пр моугольного лотка определ етс с учетом критического режима потокаTo determine the flow rate of water in a given section of a tray with a critical or supercritical flow, the average flow rate with a free flow is measured, which is the direct parameter determining the flow rate in accordance with the well-known hydraulics equation O Ash-v, where AQ is a living section flow; V is the average flow rate. Moreover, the living cross section of the flow in the hydrometric tray at a given flow rate depends on the design of the tray and the average velocity of the fluid. So, if trays are used, in the throat of which critical and supercritical flow regimes are provided, the flow rate for the rectangular tray is determined taking into account the critical flow regime
о елabout ate
оabout
Q oi/8 b vQ oi / 8 b v
РR
или в общем случаеor in general
Q CdOi/g b-v| ,Q CdOi / g b-v | ,
где v - измер ема средн скорость потока;where v is the measured average flow rate;
4 four
8 b С j - коэффициент расхода в общем случае завис щий от конструкции лотка (учитывающий также и форму его поперечного сечени );ч ускорение свободного падени ;8 b C j - coefficient of discharge in general, depending on the tray design (taking into account also the shape of its cross section), h acceleration of free fall;
ширина горловины лотка. Измерение средней скорости крити- |ческого и сверхкритического потоков значительно упрощаетс , так как экспериментально доказано, что при указанных режимах течени коэффициент Кориолиса оЈ примерно равен единице, и, следовательно, в измерительном сечении имеет место равномерна эпюра скоростей. Последнее позвол ет определить среднюю скорость потока прак- тически либо в одной точке измери- тельного сечени , либо в пределах заданного участка лотка, например по длине горловины лотка (например, ультразвуковым измерителем скорости).the width of the neck of the tray. The measurement of the average velocity of the critical and supercritical flows is greatly simplified, since it has been experimentally proved that at the indicated flow regimes the Coriolis coefficient is approximately equal to unity, and, consequently, a uniform plot of velocities takes place in the measuring section. The latter makes it possible to determine the average flow rate practically either at one point of the measuring section, or within a predetermined section of the tray, for example, along the length of the neck of the tray (for example, with an ultrasonic velocity meter).
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884632727A SU1651100A1 (en) | 1988-12-01 | 1988-12-01 | Method of defining water flow rate and its volume in measuring flume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884632727A SU1651100A1 (en) | 1988-12-01 | 1988-12-01 | Method of defining water flow rate and its volume in measuring flume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1651100A1 true SU1651100A1 (en) | 1991-05-23 |
Family
ID=21420691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU884632727A SU1651100A1 (en) | 1988-12-01 | 1988-12-01 | Method of defining water flow rate and its volume in measuring flume |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1651100A1 (en) |
-
1988
- 1988-12-01 SU SU884632727A patent/SU1651100A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Kilpatrik E.V. and Achneic- ler V,R. Use of flames in measuring discharge. - Techniques of Water Reaources JEnvestigation of the United States Government printing office. Washington, 1983. * |
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