SU656908A1 - Method of preventing aeration of hydrodynamic objects - Google Patents
Method of preventing aeration of hydrodynamic objectsInfo
- Publication number
- SU656908A1 SU656908A1 SU772535195A SU2535195A SU656908A1 SU 656908 A1 SU656908 A1 SU 656908A1 SU 772535195 A SU772535195 A SU 772535195A SU 2535195 A SU2535195 A SU 2535195A SU 656908 A1 SU656908 A1 SU 656908A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- flexible
- objects
- hydrodynamic
- order
- diameter
- Prior art date
Links
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
Изобретение относитс к экспериментальной гидромеханике и может быть исполь.зо- вано дл предотвращени аэрации гибких раст жек.The invention relates to experimental fluid mechanics and can be used to prevent the aeration of flexible stretches.
Известен способ предотвращени аэрации гидродинамических объектов, заключающийс в профилировании их сечений (1. Однако такой способ не применим .к гибким раст жкам с посто нным KpyrvibiM сечением.A known method of preventing the aeration of hydrodynamic objects, which consists in profiling their sections (1. However, this method is not applicable to flexible stretches with a constant KpyrvibiM section.
Наиболее близким техническим penjeHHCM к изобретению вл етс способ предотвращени аэрации гидродинамических объектов например гибких раст жек, включающий в себ операцию пересечени этими объектами при своем движении свободнойповерх юсти жидкости 2.The closest technical penjeHHCM to the invention is a method for preventing aeration of hydrodynamic objects, for example, flexible stretches, including the operation of crossing these objects during their movement of free fluid above the surface 2.
Однако этот способ малоэффективен в св зи с образованием воздущной кавер ы.However, this method is ineffective due to the formation of air-capped s.
Цель изобретени - повышение эффективности борьбы с аэрацией гибкой раст жки .The purpose of the invention is to increase the effectiveness of combating flexible stretching aeration.
Это достигаетс тем, что по предлагаемому способу гибкую раст жку колеблют в плоскости, перпендикул рной ее оси, с амплитудой , равной не менее 0,05 диаметра гибкой раст жки, и с частотой, равной неThis is achieved by the fact that according to the proposed method, flexible stretching is oscillated in a plane, perpendicular to its axis, with an amplitude equal to not less than 0.05 of the diameter of flexible stretching, and with a frequency equal to
менее 0,05 величины отношени скорости отиос1 тельного движени гибкой раст жки к ее диаметру.less than 0.05 of the ratio of the speed of the rotational movement of the flexible stretch to its diameter.
Гибкой раст жке сообщают искусственные (вынужденные) колебани в плоскости, перпенлаикул рной ее оси, с частотой, большей собственной частоты срыва вихрем Кармана . Вынужденные колебани раст жки могут возбуждатьс различными способами,Artificial (forced) oscillations in a plane perpendlaicular to its axis, with a frequency greater than the natural frequency of breakdown by a Karman vortex, inform flexible stretching. Forced vibrations of stretching can be excited in various ways,
например, с помощью электромагнитного устройства. Такие колебани гибкой раст жкн при ее дви.жеиии привод т к тому, что частота срыва вихрей становитс равной частоте вынужденных колебаний. Интенсивность каждого отдельного сорвавп1егос вихр в этом случае существенно уменьшаетс , и энерги этих вихрей оказываетс недостаточной дл засасывани воздуха в его дро и образовани воздущной каверны за раст жкой . Дл того, чтобы частота срыва вихрей соответствовала частоте вынужденных колебаний раст жки, необходимс.) обеспечить следующие характеристики вынужденных колебаний:,.for example, using an electromagnetic device. Such oscillations of a flexible stretch during its movement cause the frequency of breakdown of the vortices to become equal to the frequency of forced oscillations. The intensity of each individual breaking of the vortex in this case is significantly reduced, and the energy of these vortices is insufficient to suck air into its core and form an air cavity behind the stretch. In order for the vortex breakdown frequency to correspond to the frequency of forced vibrations of a stretch, it is necessary.) To provide the following characteristics of forced oscillations:,.
а 0,05 D, f 0,05a 0.05 D, f 0.05
гйе а - амплитуда вынужденных колебаний;hye a - amplitude of forced oscillations;
f - частота вынужденных колебаний;f is the frequency of forced vibrations;
D - диаметр гнбкой раст жки;D is the diameter of the gnbka stretching;
V - скорость относительного движени раст жки.V is the relative movement speed of the stretch.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772535195A SU656908A1 (en) | 1977-10-06 | 1977-10-06 | Method of preventing aeration of hydrodynamic objects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772535195A SU656908A1 (en) | 1977-10-06 | 1977-10-06 | Method of preventing aeration of hydrodynamic objects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU656908A1 true SU656908A1 (en) | 1979-04-15 |
Family
ID=20729465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU772535195A SU656908A1 (en) | 1977-10-06 | 1977-10-06 | Method of preventing aeration of hydrodynamic objects |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU656908A1 (en) |
-
1977
- 1977-10-06 SU SU772535195A patent/SU656908A1/en active
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