Evaluation of fluctuating pressures measured with connection tubes

Date

1998-01-01

Author

Aydın, İsmail

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

174
views

0
downloads

The dynamic characteristics of fluctuating pressure measuring systems composed of connection tubing and pressure transducers were analyzed. A method of correction for the effects of resonance and viscous damping on the measured pressure fluctuations was proposed. A mathematical model of the measuring system was formed combining the governing equations of the unsteady flow in the rigid connection tubing and the corresponding volumetric deformation in the transducer. Numerical solution of the governing equations were described. The phase shift between the velocity amplitude on the tube axis and the maximum wall shear stress was obtained from numerical solutions for a wide frequency range of sinusoidal pressure variations. Amplification and attenuation of sinusoidal pressure variations were given in terms of dimensionless parameters. An in situ dynamic calibration to obtain lumped compliance of the measuring system was described. The method was applied to correct the measured pressure fluctuations obtained from different sources. The mathematical and numerical model was successful in correcting amplification and attenuation occurring on different frequency bands of the same pressure record with random fluctuations.

Subject Keywords

Engineering, Civil, Engineering, Mechanical, Water Resources

URI

https://hdl.handle.net/11511/48484

Journal

Journal of Hydraulic Engineering

DOI

https://doi.org/10.1061/(asce)0733-9429(1998)124:4(413)

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Analysis of single phase convective heat transfer in microchannels with variable thermal conductivity and variable viscosity Gözükara, Arif Cem; Güvenç Yazıcıoğlu, Almıla; Department of Mechanical Engineering (2010) In this study simultaneously developing single phase, laminar and incompressible flow in a micro gap between parallel plates is numerically analyzed by including the effect of variation in thermal conductivity and viscosity with temperature. Variable property solutions for continuity, momentum and energy equations are performed in a coupled manner, for air as a Newtonian fluid. In these analyses the rarefaction effect, which is important for the slip flow regime, is taken into account by imposing slip veloc...
Evaluation of cement mortars by ultrasound Paksoy, Nesibe Gözde; Yaman, İsmail Özgür; Department of Civil Engineering (2006) Ultrasonic testing of concrete is often used for the assessment of its uniformity, strength, modulus of elasticity, durability and etc. therefore, the related parameters of testing such as the transducer frequency, the specimen geometry and etc. are well-known. On the other hand, most of the concrete properties are affected by the cement and the mechanical as well as some durability properties of cements are determined through cement mortars. Applications of ultrasound on determining the properties of cemen...
Test method for appraising future durability of new concrete bridge decks Yaman, İsmail Özgür; Aktan, H.M.; Hearn, N.; Staton, J.F. (SAGE Publications, 2002-01-01) The nondestructive test procedure for quantifying the future durability of bridge deck concrete is based on the fundamental relationship between ultrasonic pulse velocity (UPV) and the permeability of an elastic medium. An experimental study using standard concrete cylindrical specimens (ASTM C192) documented adequate sensitivity between UPV and permeability. The test procedure uses a parameter directly proportional to increase in-field concrete permeability called paste quality loss (PQL). The PQL is compu...
Analysis of high frequency behavior of plate and beam structures by statistical energy analysis method Yılmazel, Canan; Ünlüsoy, Yavuz Samim; Department of Mechanical Engineering (2004) Statistical Energy Analysis (SEA) is one of the methods in literature to estimate high frequency vibrations. The inputs required for the SEA power balance equations are damping and coupling loss factors, input powers to the subsystems. In this study, the coupling loss factors are derived for two and three plates joined with a stiffener system. Simple formulas given in the literature for coupling loss factors of basic junctions are not used and the factors are calculated from the expressions derived in this ...
Design of fiber-reinforced composite pressure vessels under various loading conditions Levend, P; Katirci, N (Elsevier BV, 2002-10-01) An analytical procedure is developed to design and predict the behavior of fiber reinforced composite pressure vessels. The classical lamination theory and generalized plane strain model is used in the formulation of the elasticity problem. Internal pressure, axial force and body force due to rotation in addition to temperature and moisture variation throughout the body are considered. Some 3D failure theories are applied to obtain the optimum values for the winding angle, burst pressure, maximum axial forc...

Citation Formats

İ. Aydın, “Evaluation of fluctuating pressures measured with connection tubes,” Journal of Hydraulic Engineering, pp. 413–418, 1998, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48484.