Optimization of an Algorithm for the Measurement of Unsteady Flow-Rates in High-Pressure Pipelines and Application of a Newly Designed Flowmeter to Volumetric Pump Analysis

2015 ◽  
Vol 138 (3) ◽  
Author(s):  
A. Ferrari ◽  
P. Pizzo
Keyword(s):  
High Pressure ◽  
Flow Rate ◽  
Liquid Flow ◽  
Pressure Sensors ◽  
Time History ◽  
Injection System ◽  
Processing Unit ◽  
Measuring Device ◽  
Instantaneous Flow ◽  
Instantaneous Flow Rate

An innovative, efficient, and robust algorithm is presented for the evaluation of the instantaneous flow-rate in high-pressure liquid flow pipelines. This algorithm is based on the pressure time histories measured at two locations. A simple ordinary differential equation has been derived from the mass and momentum conservation laws and has been solved analytically. This equation allows the flow-rate time fluctuations to be evaluated accurately around their mean value, without any need for initial datum on the liquid flow velocity. A measuring device has been designed and realized to evaluate the flow-rate. The proposed flowmeter layout consists of a piece of pipeline endowed with two piezoresistive pressure sensors equipped with miniaturized thermocouples, the pressure sensor conditioners and a central processing unit (CPU), in which the algorithm for the evaluation of the flow-rate has been implemented. A more sophisticated version of the flowmeter algorithm, which includes unsteady friction in the flow-rate evaluation, has also been developed. Different algorithm versions have been assessed and successfully validated through a comparison with numerical flow-rate data predicted using a reliable one-dimensional model of a common rail (CR) fuel injection system. The prototypal flowmeter has been installed at the delivery section of a CR volumetric pump in order to investigate the flow-rate ripple. The flowmeter traces have been compared with the predictions of a previously developed theoretical model for the pump delivered instantaneous flow-rate, in order to further assess the reliability of both the model and the flowmeter as well as to have a better understanding of the cause and effect relationships between the flow-rate time history and the dynamic working of the pump. The effects that the actuation of the fuel metering valve (FMV), which is placed at the CR pump inlet, has on the instantaneous delivered flow-rate have also been analyzed.

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

scholarly journals A twin-fluid injector for FCC feed injection

2019 ◽  
Vol 4 (3) ◽  
pp. 109-115
Author(s):  
Deepak Kumar ◽  
Tushar Sikroria ◽  
Kushari A ◽  
Pramod Kumar ◽  
Sriganesh G
Keyword(s):  
Droplet Size ◽  
Flow Rate ◽  
Liquid Flow ◽  
Liquid Flow Rate ◽  
Air Flow ◽  
Product Yield ◽  
Droplet Velocity ◽  
Injection System ◽  
Airflow Rate ◽  
Air Flow Rate

In Fluidized Bed Catalytic Cracking (FCC) process, hydrocarbon feed undergoes vapour phase cracking in presence of hot regenerated catalyst to produce valuable products like LPG, Gasoline and Diesel. FCC feed injection system is most critical hardware component of FCC unit in order to get desired product yield by minimizing the undesirable dry gas and coke yield. Typically, twin-fluid nozzles (hydrocarbon and stream) are used to atomize the feed. In the present study, a twin-fluid injector, with an internal impactor to minimize the droplet size and velocity, is designed, developed and characterized. The performance of the feeding injector was evaluated using water and air as operating fluids and the droplet size and velocity were measured 150 mm downstream of the injector tip using a PDPA system for different water and air flow rates. The average droplet size (D32) showed an increase while the droplet velocity remained almost constant with the increase in the liquid flow rate for a given flow rate of air, consistent with the increase in droplet size with decreasing air-liquid ratio for twin–fluid atomizers. But, for a given liquid flow rate, the droplet SMD decreased and the droplet velocity increased with increasing airflow rate, which can be attributed to the increase in overall kinetic energy due to the increase in air flow rate. The flow rate of liquid was seen to be independent of air flow rate unlike conventional twin-fluid atomizers. The droplet size was found to be a function of ALR and the local volume flux of the droplets was found to be a function of the liquid 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

Instantaneous Flow Rate Measurement of Ideal Gases

1996 ◽  
Vol 122 (1) ◽  
pp. 174-178 ◽  
Author(s):  
Kenji Kawashima ◽  
Toshiharu Kagawa ◽  
Toshinori Fujita
Keyword(s):  
Heat Transfer ◽  
Flow Rate ◽  
Isothermal Condition ◽  
Flow Rate Measurement ◽  
Steel Wool ◽  
Simple Method ◽  
Flow Rates ◽  
Instantaneous Flow ◽  
Ideal Gases ◽  
Instantaneous Flow Rate

In this paper, a chamber called an “Isothermal Chamber” was developed. The isothermal chamber can almost realize isothermal condition due to larger heat transfer area and heat transfer coefficient by stuffing steel wool in it. Using this chamber, a simple method to measure flow rates of ideal gases was developed. As the process during charge or discharge is almost isothermal, instantaneous flow rates charged into or discharged from the chamber can be obtained measuring only pressure in the chamber. The steady and the unsteady flow rate of air were measured by the proposed method, and the effectiveness of the method was demonstrated. [S0022-0434(00)00301-4]

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