نتایج جستجو برای: vertical intake

تعداد نتایج: 199934  

Journal: :journal of hydraulic structures 2014
vadoud naderi davood farsadizadeh ali hossein zadeh dalir hadi arvanaghi

one of the causes of perturbation at vertical intakes is the happening of vortices with an air core. the vortices with an air core occur whenever the submergence of the intake is less than a critical value. anti-vortex devices and specially plates are used to avoid the negative effects of the air-core vortices. if plates are used, then the geometry of them should be studied experimentally. acco...

ژورنال: علوم آب و خاک 2006
سید محمد علی زمردیان, , محمدرضا باقری سبزواری, ,

The vertical pipe intake is an economical structure relative to the other alternatives. VPI usually installed near the water surface and prevents from the coarse sediment entrance to the system. The strong vortex in VPI entrance is a major problem which may reduce the system efficiency. Recognizing the vortex affected parameters, helping engineers to design anti vortex structures. In this study...

سید محمد علی زمردیان, , محمدرضا باقری سبزواری, ,

The vertical pipe intake is an economical structure relative to the other alternatives. VPI usually installed near the water surface and prevents from the coarse sediment entrance to the system. The strong vortex in VPI entrance is a major problem which may reduce the system efficiency. Recognizing the vortex affected parameters, helping engineers to design anti vortex structures. In this study...

Journal: :آب و خاک 0
حمیدرضا جلیلی علی حسین زاده دلیر داوود فرسادی زاده

abstract one of the most important sources of drinking and agricultural water needs is rivers. one of the oldest methods of getting water from rivers that still has the greatest use is the gravity intake. in this type of intake, due to the disproportionate velocity at the upstream and downstream mouth of intake, occur flow separation and following sedimentation at the upstream mouth. in this st...

Ali Hossein Zadeh Dalir Davood Farsadizadeh, Hadi Arvanaghi, Vadoud Naderi,

One of the causes of perturbation at vertical intakes is the happening of vortices with an air core. The vortices with an air core occur whenever the submergence of the intake is less than a critical value. Anti-vortex devices and specially plates are used to avoid the negative effects of the air-core vortices. If plates are used, then the geometry of them should be studied experimentally. Acco...

Journal: :Aviation, space, and environmental medicine 1984
R A Fox A H Lauber N G Daunton M Phillips L Diaz

The effects of off-vertical rotation upon the intake of tap water immediately after rotation, and upon conditioned taste aversion, were assessed in mice with the tilt of the rotation axis varying from 5 to 20 degrees from the earth-vertical. Conditioned taste aversion occurred in all mice that were rotated, but the intake of tap water was suppressed only in mice that were rotated at 15 or 20 de...

Journal: :asian journal of sports medicine 0
amir-hossein memari sports medicine research center, tehran university of medical sciences, tehran, iran ramin kordi sports medicine research center, tehran university of medical sciences, tehran, iran / school of med nekoo panahi school of medicine, tehran university of medical sciences, tehran, iran laya nikookar school of medicine, tehran university of medical sciences, tehran, iran mohammad abdollahi school of medicine, tehran university of medical sciences, tehran, iran ali akbarnejad faculty of sports sciences and physical education, university of tehran, tehran, iran

purpose the aim of this study was to determine the effect of ramadan fasting on body composition, calorie intake and physical performance in young female athletes undertaking training sessions during ramadan. methods twelve voluntary female athletes (15-27 years old) were assigned to the research. a prospective study was conducted to investigate the athletes on four different occasions: one wee...

Journal: :Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 2015

Journal: :آب و خاک 0
سیدمرتضی سیدیان محمود شفاعی بجستان

abstract lateral intake is a hydraulic structure which is used for diversion of some portion of water from a river for the purpose of irrigation, storage and industrial. most of lateral intakes from canal are installed at canal with inclined banks which has not received the attention of the researchers in the past. since the flow discharge and sediment which enters the intake canal depends on t...

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