SU1049384A1 - Method for determining starting velocity of body - Google Patents
Method for determining starting velocity of body Download PDFInfo
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- SU1049384A1 SU1049384A1 SU772541596A SU2541596A SU1049384A1 SU 1049384 A1 SU1049384 A1 SU 1049384A1 SU 772541596 A SU772541596 A SU 772541596A SU 2541596 A SU2541596 A SU 2541596A SU 1049384 A1 SU1049384 A1 SU 1049384A1
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- USSR - Soviet Union
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- speed
- thread
- determining
- blowing
- moving
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
СПОСОБ ОПРЕДЕЛЕНИЯ СКОРОСТИ ТРОГАНИЯ ТЕЛА, включающий помещение тела в аэродинамическую трубу , продувание ее, отличающийс тем, что, с целью повыщени точности, тело закрепл ют на нити, определ ют его аэродинамическое сопротивлений при скорост х воздуха , не превыщающих скорости витани , . путем измерени нат жени нити и по полученным данным с учетом аэродинамического сопротивлени отдельно нити наход т искомую величину.METHOD FOR DETERMINING THE BODY TROLLEY SPEED, including placing the body in a wind tunnel, blowing it out, characterized in that, in order to improve accuracy, the body is fixed on the thread, its aerodynamic resistance is determined at air velocities not exceeding the soaring speed,. by measuring the tension of the thread and according to the data obtained, taking into account the aerodynamic drag, the threads find the desired value separately.
Description
со соwith so
00 4 Изобретение относитс к технической физике и может быть использовано дл определени скоростей трогани частиц сырь , полуфабрикатов и отдельных изделий при пневматическом транспорте. Известен способ определени скорости трогани тела, включающий помещение тела в аэродинамическую трубу, продувание ее и измерение скорости воздуха в ней в момент трогани тела, который опре дел ют визуально 1. Недостатком известного способа вл етс низка точность из-за визуального определени момента трогани тела. Целью изобретени вл етс повыщение точности определени скорости трогани Указанна цель достигаетс тем, что согласно способу определени скорости трогани тела, включающем помещение тела в аэродинамическую трубу и продувание ее, тело закрепл ют на нити, определ ют его аэродинамическое сопротивление при скорост х воздуха, не превыщающих скорости витани , путем измерени нат жени нити и по полученным данным с учетом аэродинамического сопротивлени отдельно нити наход т искомую величину. Сущность способа заключаетс в следующем . Тонкую нить одним концом прикрепл ют к телу, наход щемус в аэротрубе, а другим - к динамометру. Продува тело при разных скорост х V воздуха (вплоть до скорости, близкой к скорости витани ), снимают показани динамометра, которые представл ют собой величину сопротивлени воздушному потоку тела, прикрепленного к нити. Отн в от полученных данных значени сопротивлений предварительно продутой при тех же скорост х одной нити. получают величины сил сопротивлени тел F. Затем стро т зависимость (F) в пр моугольной системе координат, экстраполируют ее до пересечени с осью ординат и определ ют скорость трогани тела при F 0. Предлагаемый способ позвол ет повысить точность определени скорости трогани тела, так как исключаетс субъективна ощибка экспериментатора. Кроме того, этот способ позвол ет определ ть скорость трогани тела в трубах из непрозрачного материала.00 4 The invention relates to technical physics and can be used to determine the speeds of moving particles of raw materials, semi-finished products and individual products in a pneumatic transport. A known method for determining the speed of moving the body involves placing the body in a wind tunnel, blowing it out and measuring the air velocity in it at the time of moving the body, which is determined visually 1. A disadvantage of the known method is low accuracy due to visual determination of the moment of moving the body. The aim of the invention is to increase the accuracy of the moving speed. This goal is achieved by the method of determining the moving body speed, which includes placing the body in a wind tunnel and blowing it, fix the body on the thread, determine its aerodynamic resistance at air speeds not exceeding winding speed, by measuring the tension of the thread and according to the data obtained, taking into account the aerodynamic drag of the thread separately, find the desired value. The essence of the method is as follows. A thin thread at one end is attached to the body in the aerotube, and the other to the dynamometer. By blowing the body at different air velocities V (up to speeds close to the soaring speed), a dynamometer is read, which is the resistance to the airflow of the body attached to the thread. Rel from the data obtained resistance values previously purged at the same speed of one thread. The values of the resistance forces of bodies F are obtained. Then, the dependence (F) is built in the rectangular coordinate system, it is extrapolated to intersection with the ordinate axis and the body moving speed is determined at F 0. The proposed method allows to increase the accuracy of body moving speed, The subjective error of the experimenter is excluded. In addition, this method makes it possible to determine the speed of moving the body in tubes of opaque material.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772541596A SU1049384A1 (en) | 1977-11-11 | 1977-11-11 | Method for determining starting velocity of body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772541596A SU1049384A1 (en) | 1977-11-11 | 1977-11-11 | Method for determining starting velocity of body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1049384A1 true SU1049384A1 (en) | 1983-10-23 |
Family
ID=20732162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU772541596A SU1049384A1 (en) | 1977-11-11 | 1977-11-11 | Method for determining starting velocity of body |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1049384A1 (en) |
-
1977
- 1977-11-11 SU SU772541596A patent/SU1049384A1/en active
Non-Patent Citations (1)
| Title |
|---|
| 1. Рабкин А.Н., Участкин П.В, О взаимодействии между скорост ми витани , трогани и транспортировани отходов хлопкопр дильного производства. Извести ВУЗов.-«Технологи текстильной промышленности, 1971, № 3, с. 124-127 (прототип). * |
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