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.

Sensors and method for measurement of flow rates and cumulative flow in ducts

Abstract: The present invention relates to a sensor for measuring the instantaneous rate of mass flow and the cumulative mass flow in steady or unsteady flows of single-phase liquids or gases in a duct. By measuring the shear stress or the streamwise pressure gradient at the duct wall, and relating it to mass flow through solutions to the Navier Stokes equations of fluid mechanics, information on mass flow through the entire duct cross sectional area is deduced.

Optimal Micro-Vane Flow Control for Compact Air Vehicle Inlets

Abstract: The purpose of this study on micro-vane secondary flow control is to demonstrate the viability and economy of Response Surface Methodology (RSM) to optimally design micro-vane secondary flow control arrays, and to establish that the aeromechanical effects of engine face distortion can also be included in the design and optimization process These statistical design concepts were used to investigate the design characteristics of "low unit strength" micro-effector arrays "Low unit strength" micro-effectors are micro-vanes set at very low angles-of-incidence with very long chord lengths They were designed to influence the near wall inlet flow over an extended streamwise distance, and their advantage lies in low total pressure loss and high effectiveness in managing engine face distortion Therefore, this report examines optimal micro-vane secondary flow control array designs for compact inlets through a Response Surface Methodology

Device for measuring the mass flow or flow rate of a gas

Abstract: A device for measuring the mass flow or flow rate of a gas which entrains ions produced by an electrode positioned in the path of the gas flow, this electrode being brought to a certain potential with respect to at least one other electrode also arranged in the flow path.

Method and apparatus for determining differential flow characteristics of a multiple meter fluid flow system

Abstract: A fluid flow system (300) is provided. The fluid flow system (300) includes a pipeline (302) with a flowing fluid. The fluid flow system (300) further includes a first vibrating meter (5) including a first sensor assembly (10) located within the pipeline (302) and configured to determine one or more flow characteristics, including a first flow rate. A second vibrating meter (5') including a second sensor assembly (10') located within the pipeline (302) is provided that is in fluid communication with the first sensor assembly (10) and configured to determine one or more flow characteristics, including a second flow rate. The fluid flow system (300) further includes a system controller (310) in electrical communication with the first and second vibrating meters (5, 5'). The system controller (310) is configured to receive the first and second flow rates and determine a differential flow rate based on the first and second flow rates. The system controller (310) is further configured to compare the differential flow rate to a threshold value or band and correct one or more flow characteristics if the differential flow rate is less than a threshold value or band.

Method and apparatus for proving electronic gas meters

Abstract: A method and apparatus for proving an electronic gas meter and the like that includes counting the number of pulses provided by an encoder associated with a bell prover to define a volume of test fluid which is supplied to the meter under test, enalbing the meter to measure the volumetric fluid flow rate and integrating the volumetric flow rate of test fluid measured by the gas meter during the test, and data representing the actual volume of test fluid supplied to the meter under test to determine the percent proof or accuracy of the meter.