Flood Protection by Vortex Valves

1981 ◽  
Vol 103 (4) ◽  
pp. 338-341 ◽  
Author(s):  
H. Brombach
Keyword(s):  
Flow Control ◽  
Control Function ◽  
Vortex Chamber ◽  
Flood Protection ◽  
Bad Weather ◽  
Conical Vortex ◽  
Flood Retention

The flow control function of a flood retention reservoir is taken care of by two double-controlled conical vortex valves. The nozzle diameters of these valves are 900 mm, the diameter of the vortex chamber being 2700 mm. The rate of the outflow to be controlled is up to 8 m3/s. The valves were installed in the spring of 1980 and will be put into service in 1981. Their purpose is to protect a town from floods caused by bad weather.

Vortex Flow Controllers in Sanitary Engineering

1984 ◽  
Vol 106 (2) ◽  
pp. 129-133 ◽  
Author(s):  
H. Brombach
Keyword(s):  
Flow Control ◽  
Flow Pattern ◽  
Flow Resistance ◽  
Vortex Flow ◽  
Vortex Chamber ◽  
Control Problems ◽  
Inlet Port ◽  
Input Pressure ◽  
Conical Vortex ◽  
Moving Parts

Flow control problems in combined sewerage systems can be solved with the aid of a new variation of the vortex amplifier. This valve has no moving parts, and comes under the category of pure fluidics; it has a conical vortex chamber and a single inlet port. Depending on the level of water in the vortex chamber the flow pattern may be either axially symmetrical or axially asymmetrical. This effect enables the device to alter its flow resistance in response to the input pressure. Several hundred of this type of the flow controller are already in operation. An example of their application is described below.

Capacitance-Based Design of the Tap Water Flow Control Device

2013 ◽  
Vol 273 ◽  
pp. 694-698
Author(s):  
Ying Qi Zhang ◽  
You Feng Luo ◽  
Ming Feng Lin ◽  
Wei Xiong
Keyword(s):  
Flow Control ◽  
Water Flow ◽  
Control Function ◽  
Tap Water ◽  
Flow Regulation ◽  
Control Device ◽  
Step Motor ◽  
Switching Frequency ◽  
Frequency Signal ◽  
Flow Control Device

In this paper, a capacitance-based design of the tap water flow control device is introduced. It is designed to prevent the waste of water resources caused by the current taps. It collects the capacitance signal by means of C/F conversion module based on 555 timer. Then the switching frequency signal and the flow frequency signal are generated according to the capacitance signal collected. They will be analyzed and compared with the signal STC15F100 microcontroller stored and generating the switch commands and flow regulation instructions to control the step motor. Finally, the water flow control function is realized by the device.

A CFD Analysis for the Advanced Accumulator

2014 ◽  
Author(s):  
Donghua Lu ◽  
Kuo Wang ◽  
Qianhua Su ◽  
Jun Xing
Keyword(s):  
Fluid Dynamics ◽  
Flow Control ◽  
Flow Pattern ◽  
Flow Rate ◽  
Vortex Chamber ◽  
Flow Chamber ◽  
High Flow ◽  
Low Flow ◽  
Cfd Analysis ◽  
Computational Fluid Dynamics Cfd

A new design for the flow control component of an advanced accumulator (ACC) was introduced and numerically investigated in the paper. The flow control component can produce high flow rate and low flow rate at the different stages during the safety injection. The FLUENT computational fluid dynamics (CFD) was used in the simulation of the flow pattern in the flow chamber and the outlet. The flow pattern and pressure gradient in the vortex chamber were investigated. The results show the design can realize the high flow and low flow in this design.

scholarly journals Performance Comparison of AODV and AOMDV Protocol Routing with TCP and UDP on Mobile Ad-Hoc Network (Manet) Using Malicious Node (Blackhole Attack)

MULTINETICS ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 21-29
Author(s):  
Nurul Faizah ◽  
Siti Ummi Masruroh ◽  
Ivan Gustra Manca Armenia
Keyword(s):  
Flow Control ◽  
Packet Loss ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Control Function ◽  
Packet Transmission ◽  
Malicious Node ◽  
Package Delivery ◽  
Mobile Ad Hoc

Transmission package delivery can be a problem of routes on the network, one of them is the Wireless network. Mobile Ad-Hoc Network (MANET) topology is often used on Wireless networks. The existence of a malicious node is a threat to MANET. Package delivery uses AODV and AOMDV Protocol Routing in TCP and UDP packet transmission. This study uses a simulation method using NS2, NAM and AWK. The Quality of Service (QoS) parameters used are throughput, packet loss, and jitter. Simulations are carried out using malicious nodes, the results on the AOMDV TCP graph have the highest input values and the best packets but are difficult to minimize energy, while for the TCP jitter values graph is best because it has a flow control function that can adjust the trajectory. The results in AOMDV TCP have the highest input value and the best packet loss but it is difficult to minimize energy, while for TCP value jitters it is best because it has a flow control function that can adjust the trajectory

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