215 Flow-Rate Variation Pressure for Tainter Gates and Resulting Instantaneous Flow-Rate Coefficient

2000 ◽  
Vol 2000 (0) ◽  
pp. 63-64
Author(s):  
Keiko ANAMI ◽  
Ichishi KUSANO ◽  
Noriaki ISHII ◽  
Aknori NAKATA ◽  
Kouji TOKUSHIMA
Keyword(s):  
Flow Rate ◽  
Rate Coefficient ◽  
Rate Variation ◽  
Instantaneous Flow ◽  
Flow Rate Coefficient ◽  
Instantaneous Flow Rate

Measurement of Instantaneous Flow-Rate Coefficients and FIV Characteristics of Tainter Gates at Large Openings

2014 ◽  
Author(s):  
Keiko Anami ◽  
Noriaki Ishii ◽  
Tatsuya Oku ◽  
Charles Knisely ◽  
Takuma Tsuji
Keyword(s):  
Flow Rate ◽  
Rate Coefficient ◽  
Dynamic Instability ◽  
Hydrodynamic Pressure ◽  
Rate Coefficients ◽  
Rate Variation ◽  
Instantaneous Flow ◽  
Flow Rate Coefficient ◽  
Instantaneous Flow Rate ◽  
Periodic Changes

Tainter gates become dynamically stable at large gate openings, even though they usually exhibit intense dynamic instability at small gate openings. To assess which factors govern this stability at large openings, model investigations were conducted. The present study focuses on discharge characteristics and hydrodynamic pressures at large gate openings. The model tests were conducted using a 1/27-scaled 2-dimensional model of the Folsom Dam Tainter gate. The instantaneous flow-rate coefficient was obtained from LDV measurements of flow velocity accompanying periodic changes in the gate opening. Measurements of the hydrodynamic pressure associated with the flow-rate variation were also used to determine instantaneous flow-rate coefficients. Comparison of the directly measured instantaneous flow-rate coefficient form LDV measurements with that obtained from pressure measurements suggests that the flow field is less receptive to disturbances due to gate motion at larger gate openings. With increased gate openings, the fluctuating fluid force acting on the gate decreases, making the gate dynamically stable.

The Electronic Part of the Metal Tube Rotameter

2013 ◽  
Vol 419 ◽  
pp. 661-666 ◽  
Author(s):  
Bo Mo ◽  
Fei Yu Jiang ◽  
Hui Xin Zhang
Keyword(s):  
Flow Rate ◽  
Electric Circuit ◽  
Magnetic Sensors ◽  
Metal Tube ◽  
Flow Signal ◽  
Instantaneous Flow ◽  
Electronic Part ◽  
Flow Rate Change ◽  
Fitting In ◽  
Instantaneous Flow Rate

The electronic part of the metal tube rotameter which is based on the magnetic sensors and microcontroller C8051F005 is studied. The flow rate change causes the change of the floats position in the metal tube and leads to rotation of the coupling magnet. Then the change of magnetic angle is detected by the magnetoresistive sensors, and a signal is generated. The signal is processed by the electric circuit and made available for the microcontroller for sampling. Then it will has linearization fitting in the microcontroller and finally has a output. This system could automatically sample the flow signal, calculate the instantaneous flow rate, and display them on the LCD screen.

A Measurement of Instantaneous Flow Rate of an Automotive Gaseous Fuel Injector

2007 ◽  
Author(s):  
Mikiya Araki ◽  
Yasuhiro Fujiwara ◽  
Seiichi Shiga ◽  
Hisao Nakamura ◽  
Tomio Obokata
Keyword(s):  
Flow Rate ◽  
Gaseous Fuel ◽  
Fuel Injector ◽  
Instantaneous Flow ◽  
Instantaneous Flow Rate

ENGINEERING ASPECTS OF MILKING MACHINE RESEARCH

1965 ◽  
Vol 28 (5) ◽  
pp. 166-169
Author(s):  
R. W. Guest ◽  
E. Stanley Shepardson ◽  
James S. Townsend
Keyword(s):  
Flow Rate ◽  
Instantaneous Flow ◽  
End Pressures ◽  
Milking Machine ◽  
Instantaneous Flow Rate ◽  
Error Limited

Summary Research was undertaken to learn more precisely the physical aspects of mechanical milking. Attempts to measure the instantaneous flow rate have not been successful. A technique to measure precisely the vacuum at the teat end was developed and several measurements made. The work indicates previous assumptions regarding teat end pressures may have been in error. Limited work to date indicates a need for continuing efforts.

2220 Instantaneous flow rate measurement of an automotive gaseous fuel injector

2008 ◽  
Vol 2008.7 (0) ◽  
pp. 67-68
Author(s):  
Mikiya ARAKI ◽  
Yasuhiro FUJIWARA ◽  
Seiichi SHIGA ◽  
Hisao NAKAMURA ◽  
Tomio OBOKATA
Keyword(s):  
Flow Rate ◽  
Gaseous Fuel ◽  
Fuel Injector ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Instantaneous Flow ◽  
Instantaneous Flow Rate
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