Topic
Thermal mass flow meter
About: Thermal mass flow meter is a research topic. Over the lifetime, 1759 publications have been published within this topic receiving 21878 citations.
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Patent•
27 Feb 1989
TL;DR: In this paper, a hot wire air flow meter arrangement comprises a primary and an auxiliary air flow path defined in the air induction passage, which is used for monitoring air flow rate therethrough.
Abstract: A hot wire air flow meter arrangement comprises a primary and an auxiliary air flow path defined in the air induction passage. A hot wire is provided in the primary air flow path for monitoring air flow rate therethrough. A flow restricting means is provided in the auxiliary air flow path for restricting air flow therethrough. The flow restricting means is selectively operative so that it is effective for restricting air flow in a low engine load condition to force the major part of induction air to flow through the primary air flow path and is not effective at high engine load range so as to minimize flow resistance for induction of sufficient amount of air to an internal combustion engine.
6 citations
Patent•
11 Dec 2003
TL;DR: In this paper, a flow meter system is described and the methods for calibrating the system and determining pour volumes are explained, as well as the methods to calculate the pour volumes.
Abstract: This invention relates to a device and a method by which to directly measure based on pressure and/or temperature data and to control the flow rate, viscosity, density, velocity, pressure or temperature of a variety of fluids in motion with improved reliability and less susceptibility to disturbance of the measuring and control system while, at the same time, offering maximum flexibility for influencing measurement and control data. Components of the flow meter system are described and the methods for calibrating the system and determining pour volumes are explained.
6 citations
TL;DR: In this article, a portable flow test rig for traceable calibration measurements of the flow rate (mass - and volume flow) in a range of 5gmin −1 to 500g min −1 and in a pressure range of 0.1-MPa to 85mPa was developed, which is based on the gravimetrical measuring procedure with flying-start-and-stop operating mode.
6 citations
TL;DR: In this article, a camera simultaneously operated with a stroboscope was used to investigate the flow characteristics of steady state pneumatic transportation of solids in horizontal pipes at low fluid velocities.
6 citations
Book•
22 Jul 2013
TL;DR: In this article, an equation was developed to correlate the mass flow to inlet lip wall static pressure measurements to determine how a proposed noise reduction concept affects fan performance, flow measurements can be used to compute mass flow.
Abstract: The Advanced Noise Control Fan at the NASA Glenn Research Center is used to experimentally analyze fan generated acoustics. In order to determine how a proposed noise reduction concept affects fan performance, flow measurements can be used to compute mass flow. Since tedious flow mapping is required to obtain an accurate mass flow, an equation was developed to correlate the mass flow to inlet lip wall static pressure measurements. Once this correlation is obtained, the mass flow for future configurations can be obtained from the nonintrusive wall static pressures. Once the mass flow is known, the thrust and fan performance can be evaluated. This correlation enables fan acoustics and performance to be obtained simultaneously without disturbing the flow.
6 citations