Research on Cantilever Used for Thermal Flow Meter as Switch

2014 ◽  
Vol 989-994 ◽  
pp. 3270-3273
Author(s):  
Zhi Li Zhang ◽  
Yuan Qing Wu ◽  
Chun Mei Liu
Keyword(s):  
Air Flow ◽  
Working Life ◽  
Thermal Flow ◽  
Flow Meter

In order to reduce consumption of thermal flow meter and prolong its working life, this article makes a research on cantilever switch, which control the circuit and save its energy. A cantilever was added into flow meter and was put into the air flow aisle in front of sensors. Process was designed and nanoimprint method was used to realize cantilever. The device was simulated and the effect on reducing consumption was certified, which has great significance on thermal flow meter.

The Effect Of Intake System Geometry On The Sensitivity Of Hot Film Type Air Flow Meter

2003 ◽  
Author(s):  
Youngjin Cho ◽  
Gangyung Lee ◽  
Cha-Lee Myung ◽  
Simsoo Park ◽  
Si Hun Lee ◽  
...  
Keyword(s):  
Air Flow ◽  
Flow Meter ◽  
Intake System ◽  
Film Type ◽  
Hot Film ◽  
System Geometry

ASSESSMENT OF LUNG FUNCTION USING AN AIR-FLOW METER

The Lancet ◽  
1975 ◽  
Vol 305 (7902) ◽  
pp. 310-311 ◽  
Author(s):  
Max Friedman ◽  
Stuart Walker
Keyword(s):  
Lung Function ◽  
Air Flow ◽  
Flow Meter

scholarly journals Pulsating Flow Characteristics of Hot-Wire Air Flow Meter for Gasoline Fuel-Injection System.

1993 ◽  
Vol 59 (559) ◽  
pp. 935-940
Author(s):  
Yoshishige Ohyama ◽  
Khotarou Hirasawa ◽  
Yutaka Nishimura ◽  
Minoru Ohsuga ◽  
Mamoru Fujieda
Keyword(s):  
Fuel Injection ◽  
Air Flow ◽  
Flow Characteristics ◽  
Pulsating Flow ◽  
Injection System ◽  
Fuel Injection System ◽  
Hot Wire ◽  
Flow Meter

Flow Microsensor of Thermal Type for Measurements of Gas Fluxes

2012 ◽  
Vol 249-250 ◽  
pp. 118-125
Author(s):  
Oleg Sazhin
Keyword(s):  
Analytical Model ◽  
Air Flow ◽  
Flow Sensor ◽  
Functional Characteristics ◽  
Flow Meter ◽  
Model Application ◽  
Gas Fluxes ◽  
Basic Characteristics

An analytical model of the flow sensor of thermal type is developed. The results of the model application are used to develop a flow microsensor of thermal type with optimal functional characteristics. The technology of microsensor manufacturing is provided. The prototype of the microsensor suitable for use in the mass air flow meter is created. The basic characteristics of the microsensor are presented.

Scale Model Testing Towards Primary Air Optimization of a CFB Boiler

2013 ◽  
Author(s):  
Tyler Hughes ◽  
John Kang ◽  
Daniel Porter ◽  
Sastry Munukutla ◽  
Stephen Idem
Keyword(s):  
Flow Control ◽  
Flow Direction ◽  
Air Flow ◽  
Scale Model ◽  
Centrifugal Fan ◽  
Duct Flow ◽  
Flow Meter ◽  
Cfb Boiler ◽  
Measurement Plane ◽  
Improve Measurement

Primary air flow is supplied to the wind box of a 300 MW CFB boiler by means of three primary air ducts connected to a common plenum. A flow rate measurement is performed in each duct using an Annubar flow meter. Due to the tight configuration of the piping and the associated turbulence, the measured flows in the three ducts were not consistent, resulting in improper air flow distribution in the boiler. A primary air duct flow study was performed in an effort to improve measurement accuracy, which will lead to improved combustion efficiency and low load cycling by allowing precision air flow control in the furnace. The objective of this project was to employ a 1/10th scale model test to determine the best method to improve the flow upstream of each Annubar flow meter. Tests were conducted with room temperature air at several flow rates generated by a centrifugal fan. Reynolds number independence was achieved in the tests. Appropriate dimensionless Grashof and Prandtl number scaling was used to extrapolate the scale model tests to the high temperature conditions prevalent in the unit. Flow visualization and measurements using a five-hole directional velocity probe were performed. It was determined that mounting 50% open area screens in the primary air duct of the scale model had the effect of significantly reducing both yaw and pitch angles across the Annubar measurement plane. A complimentary benefit was that the velocity profiles in the flow direction were notably flattened by the addition of the screens. Furthermore the performance of the Annubar flow meters could be improved if the measurement plane was moved further upstream of the opposed blade flow control damper.

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