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Anna Perelomova and Weronika Pelc-Garska

-equilibrium gases with vrt-mechanism of relaxation , Zh. Tekh. Fiz., 55, 754 [(1985), Sov. Phys. Tech. Phys., 30, 447]. [9] MOLEVICH N.E. (2002), Non-stationary self-focusing of sound beams in a vibrationally excited molecular gas , Acoustical Physics, 48, 2, 209-213. [10] MOLEVICH N.E. (2003), Sound velocity dispersion and second viscosity in media with nonequilibrium chemical reactions , Acoustical Physics, 49, 2, 189-192. [11] MORTELL M.P., MULCHRONE K.F., SEYMOUR B.R. (2009), The evolution of macrosonic standing waves in a resonator , International Journal of

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D. Nowak, M. Stachowicz, K. Granat and M. Pigiel

Abstract

The paper presents measurement results of standing wave ratio to be used as an efficiency indicator of microwave absorption by used moulding and core sands chosen for the microwave utilization process. The absorption measurements were made using a prototype stand of microwave slot line. Examined were five used moulding and core sands. It was demonstrated that the microwave absorption measurements can make grounds for actual microwave utilization of moulding and core sands.

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Alexey Lysenko, Nikolay Yurkov, Vasiliy Trusov, Tatyana Zhashkova and Jurijs Lavendels

. [18] S. Zhong, S. O. Oyadiji, and K. Ding, “Response-only method for damage detection of beam-like structures using high accuracy frequencies with auxiliary mass spatial probing,” Journal of Sound and Vibration , vol. 311, no 3–5, pp. 1075–1099, 2008. https://doi.org/10.1016/j.jsv.2007.10.004 [19] I. P. Shatskii and V. V. Perepichka, “Shock-wave propagation in an elastic rod with a viscoplastic external resistance,” Journal of Applied Mechanics and Technical Physics , vol. 54, no. 6, pp. 1016–1020, 2013. https://doi.org/10.1134/S0021894413060163 [20

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Jakub Kajurek, Artur Rusowicz and Andrzej Grzebielec

.C.H., de Waele A.T.A.M.: Construction and performance of a thermoacoustic refrigerator. Cryogenics 42(2002), 59-66. [16] Herman C, Chen Y.: A simplified model of heat transfer in heat exchangers and stack plates of thermoacoustic refrigerators. Heat Mass Transfer 42(2006), 901-917. [17] Zolpakar N.A., Mohf-Ghazil N., El-Fawal M.H.:Performance analysis of standing wave thermoascoustic refrigerator: A review. Renew. Sust. Energ. Rev. 54(20016), 626-634. [18] Swift G.W.: Thermoacoustic: a unifying perspective for some engines

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Gašper Rak, Marko Hočevar and Franci Steinman

Abstract

The complexity of flow conditions at junctions amplifies significantly with supercritical flow. It is a pronounced three-dimensional two-phased flow phenomenon, where standing waves with non-stationary water surface are formed. To analyse the hydrodynamic conditions at an asymmetric right-angled junction with incoming supercritical flows at Froude numbers between 2 and 12, an experimental approach was used. For a phenomenological determination of the relations between the integral parameters of incoming flows and the characteristics of standing waves at the junction area, water surface topographies for 168 scenarios at the junction were measured using non-intrusive measurement techniques. The new, phenomenologically derived equations allow for determination of location, height and extent of the main standing waves at the junction. Research results give important information on the processes and their magnitude for engineering applications.

Open access

Anna Perelomova

of macrosonic standing waves in a resonator , International Journal of Engineering Sience, 47 , 11–12, 1305–1314, http://dx.doi.org/10.1016/j.ijengsci.2008.10.012 . 12. O chmann M. (1985), Nonlinear resonant oscillations in closed tubes – an application of the averaging method , J. Acoust. Soc. Am., 77 , 1, 61–66, http://dx.doi.org/10.1121/1.391901 . 13. O sipov A.I., U varov A.V. (1992), Kinetic and gasdynamic processes in nonequilibrium molecular physics , Sov. Phys. Usp., 35 , 11, 903–923, http://dx.doi.org/10.1070/PU1992v035n11ABEH002275

Open access

Anna Perelomova

acoustic-gravity waves in a baroclinic fluid, Physics of Fluids, 13, 1274-1280. 6. Kaner A., Rudenko O.V., Khokholov R.V. (1977), Theory of nonlinear oscillations in acoustic resonators, Sov. Phys. Acoust., 23, 5, 432-437. 7. Leble S.B. (1990), Nonlinear waves in waveguides with stratification, Springer-Verlag, Berlin. 8. Leble S., Perelomova A. (2013), Problem of proper decomposition and initialization of acoustic and entropy modes in a gas affected by the mass force, Applied Mathematical Modelling, 37, 629

Open access

Michał Orzechowski and Piotr Budniak

-1253. Silins U., Lieffers V. J., Bach L. 2000. The effect of temperature on mechanical properties of standing lodgepole pine trees. Trees, 14 (8): 424-428. Wang X., Divos F., Pilon C., Brashaw B. K., Ross R. J., Pellerin R. F. 2004. Assessment of Decay in Standing Timber Using Stress Wave Timing Nondestructive Evaluation Tools. Madison, USDA Forest Service, Forest Products Laboratory, General Technical Report. Yamamoto K., Sulaiman O., Hashim R. 1998. Nondestructive detection of heart rot of Acacia mangium trees in Malaysia. Forest Products

Open access

Stefan Weyna, Witold Mickiewicz, Michał Pyła and Michał Jabłoński

a flat plate , Experiments in Fluids, 34 , 63-67. 7. Siddiqui K., Nabavi M. (2008), Measurement of the acoustic velocity characteristics in a standing-wave tube using out of phase PIV , Flow Measurement and Instrumentation, 19 , 364-369. 8. Tropea A., Yarin A.L., Foss J.F. (2007), Springer Handbook of Experimental Fluid Mechanics , Springer- Verlag, Berlin, Heidelberg. 9. Weyna S. (2010a), Visualization methods of acoustic energy transfer paths in the 3D field with obstacles , Proceedings of Conf. on Noise

Open access

A. C. Matheson, W. J. Gapare, J. Ilic and H. X. Wu

, CSIRO: Melbourne. 214 pp. WANG, X., F. DIVOS, C. PIKON, B. K. BRASHAW, R. J. ROSS and R. F. PELLERIN (2004): Assessment of decay in standing timber using stress wave timing non-destructive evaluation tools. USDA Forest Service Forest Products Laboratory General Technical Report FPL-GTR-147, 12pp. WU, H. X., J. L. YANG, T. A. MCRAE, L. LI, IVKOVIC´ and M. B. POWELL (2004): Breeding for wood quality and profits with radiata pine, 1: MOE prediction and genetic correlation between early growth, density, microfibril angle and rotation