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|Series||VTT publications -- 327., VTT julkaisuja -- 327.|
uncertainty of acoustic method. • Secondly it seems to be important to improve the integration of the flow profiles near the walls. • Finally this paper proposes a new interpolation method for the main flow. Near-wall Flow An important topic of an acoustic measurement is the integration of flow velocities in the boundary regions. G. Fowles, W.H. Boyes, in Instrumentation Reference Book (Fourth Edition), Introduction. Flow measurement is a technique used in any process requiring the transport of a material from one point to another (for example, bulk supply of oil from a road tanker to a garage holding tank). It can be used for quantifying a charge for material supplied or maintaining and . The system employs a partial gas/liquid separation using a T-junction configuration and a combination of Doppler and cross correlation. The partially separated flow regimes uses ultrasonic cross correlation measurement for the liquid flow measurement which has gas entrained within it. The homogeneous regime employs ultrasonic Doppler : Khalifa M. Khalifa, Mike L. Sanderson. Cam Correlation Analysis using Acoustic Discharge Measurement. With the addition of an on-line flow measurement, differences between the expected and .
1 Novel Methods for Acoustic Indoor Measurements and Applications in Aero-Engine Test Cells P.Böhning 1, H. Siller 2, K. Holland3, F. Arnold 1, A. Kempton 4, U. Michel2 1 Rolls-Royce Deutschland, Dahlewitz, Germany 2 DLR Engine Acoustics, Berlin, Germany 3 ISVR, Southampton, U.K. 4 Rolls-Royce, Derby, U.K. ABSTRACT The research institutes DLR in . Using the conventional volumetric method in unsteady-state relative permeability measurements for unconventional gas reservoirs, such as coal and gas shale, is a significant challenge because the movable water volume in coal or shale is too small to be detected. Moreover, the dead volume in the measurement system adds extra inaccuracy to the Cited by: 3. The present study describes the results of acoustic pyrometer testing in an operating gas turbine engine under load using an active acoustic pyrometer system containing eight sets of transmitters and receivers, all external to the turbine exhaust flow path. This active method technology is based on the temperature dependence of the isentropic Cited by: Flow Measurement and Instrumentation is dedicated to disseminating the latest research results on all aspects of flow measurement, in both closed conduits and open design of flow measurement systems involves a wide variety of multidisciplinary activities including modelling the flow sensor, the fluid flow and the sensor/fluid interactions through the use of .
In this paper, the feasibility of measuring the gas volume fraction in a mixed gas-liquid flow by using an acoustic resonant spectroscopy (ARS) method in a transient way is studied theoretically and experimentally. Firstly, the effects of sizes and locations of a single air bubble in a cylindrical cavity with two open ends on resonant frequencies are investigated by: 3. with the acoustic pressure at an angle of 20 to the jet axis, but of only at The correlation levels were also found to decrease dramatically as the Mach number decreases, as illustrated by the correlation of obtained at 20 to the jet axis for a jet at M= Other authors determined the cross-correlations betweenCited by: analysis of gas samples that were taken from the gas chamber. Before each experiment, the gas chromatograph was calibrated using calibration gases. During the experiments, the gas chromatograph and the gas flow meter recorded concurrent measurements every third minute on gas composition, flow velocity and speed of sound. Contributions are invited on novel achievements in all fields of measurement and instrumentation science and technology. Authors are encouraged to submit novel material representing achievements in the field, whose ultimate goal is an enhancement of the state-of-the-art of subjects such as: measurement and metrology fundamentals, measurement science, sensors, .