%0 Journal Article %1 Gedanitz2010 %A Gedanitz, Holger %A Dávila, María J. %A Baumhögger, Elmar %A Span, Roland %D 2010 %J The Journal of Chemical Thermodynamics %K 2010 instrument speed-of-sound %N 4 %P 478 - 483 %R 10.1016/j.jct.2009.11.002 %T An apparatus for the determination of speeds of sound in fluids %U http://dx.doi.org/10.1016/j.jct.2009.11.002 %V 42 %X An apparatus for accurate measurements of the sound velocity in fluids is described, which is based on the pulse-echo technique, and operates up to 30 MPa in the temperature range between (250 and 350) K. The expanded uncertainties (k = 2) in the speed of sound measurements are 0.006\%, 6 mK in the temperature, 2.1 hPa in the pressure up to 3 MPa, and 23.9 hPa above this value. Measurements of the speed of sound for nitrogen from (250 to 350) K and for water at temperatures between (303.15 and 323.15) K are presented at pressures up to 30 MPa to validate the new apparatus. The expanded overall uncertainty of the measurements on nitrogen and water were estimated to be 0.011\% and 0.006\%, respectively. The speed of sound of both fluids was compared with literature sources showing an excellent agreement among them, with relative deviations lower than 0.01\% in nitrogen and 0.006\% in water.

@article{Gedanitz2010, abstract = {An apparatus for accurate measurements of the sound velocity in fluids is described, which is based on the pulse-echo technique, and operates up to 30 MPa in the temperature range between (250 and 350) K. The expanded uncertainties (k = 2) in the speed of sound measurements are 0.006\%, 6 mK in the temperature, 2.1 hPa in the pressure up to 3 MPa, and 23.9 hPa above this value. Measurements of the speed of sound for nitrogen from (250 to 350) K and for water at temperatures between (303.15 and 323.15) K are presented at pressures up to 30 MPa to validate the new apparatus. The expanded overall uncertainty of the measurements on nitrogen and water were estimated to be 0.011\% and 0.006\%, respectively. The speed of sound of both fluids was compared with literature sources showing an excellent agreement among them, with relative deviations lower than 0.01\% in nitrogen and 0.006\% in water.}, added-at = {2011-01-19T18:06:06.000+0100}, author = {Gedanitz, Holger and Dávila, María J. and Baumhögger, Elmar and Span, Roland}, biburl = {https://www.bibsonomy.org/bibtex/233f1207f2243b718e900515f8ee13d05/thorade}, description = {ScienceDirect - The Journal of Chemical Thermodynamics : An apparatus for the determination of speeds of sound in fluids}, doi = {10.1016/j.jct.2009.11.002}, interhash = {8b0fb00a66da9dbd3e4e462683baf9b7}, intrahash = {33f1207f2243b718e900515f8ee13d05}, issn = {0021-9614}, journal = {The Journal of Chemical Thermodynamics}, keywords = {2010 instrument speed-of-sound}, number = 4, pages = {478 - 483}, timestamp = {2011-07-21T11:21:19.000+0200}, title = {An apparatus for the determination of speeds of sound in fluids}, url = {http://dx.doi.org/10.1016/j.jct.2009.11.002}, volume = 42, year = 2010 }