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- since 1996 -
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Technical Discussions
gaf
gaf
01:19 Aug-26-1999
Sound velocity in water

Does anybody have any information about how to determine sound velocity in water at elevated teperatures. Temperatures would be greater than the boiling point at atmospheric pressures.


    
 
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Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
01:48 Aug-26-1999
Re: Sound velocity in water

: Does anybody have any information about how to determine sound velocity in water at elevated teperatures. Temperatures would be greater than the boiling point at atmospheric pressures.

How hot? In what sort of container? In general, the way we usually measure sound velocities in liquids is to put the stuff in a test cell with parallel walls and measure the transit time across the resulting fixed sound path between the inside walls of the container. The transit time measurement can be done with any one of a number of ultrasonic instruments. Maybe you can provide a few more details about the circumstances of your test.

--Tom Nelligan
Panametrics, Inc.


    
 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1268

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1268
03:27 Aug-26-1999
Re: Sound velocity in water
: Does anybody have any information about how to determine sound velocity in water at elevated teperatures. Temperatures would be greater than the boiling point at atmospheric pressures.

I have an old copy of the CRC Handbook of Chemistry and Physics. There is a section on sound velocity in it. There is even a special item on velocities for water over 212F (100C)

The source is from Acoustical Society of America volume 31, 1959, J.C.McDade, D.R.Pardue, AL Gedrich and F.Vrataric

It is a long list of temperatures and velocities. I will supply a few but you can get the CRC Handbook from any library. Temp I provide in degrees F and Velocity in m/s

Temp Vel
200 1548
210 1544
220 1538
230 1532
240 1524
250 1516
260 1507
270 1497
280 1487
290 1476
300 1465
At 550 degrees F the velocity they publish is 980m/s

Hope this helps

Ed


    
 
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Wieslaw Bicz
Wieslaw Bicz
07:46 Aug-28-1999
Re: Sound velocity in water
:
: : Does anybody have any information about how to determine sound velocity in water at elevated teperatures. Temperatures would be greater than the boiling point at atmospheric pressures.

: How hot? In what sort of container? In general, the way we usually measure sound velocities in liquids is to put the stuff in a test cell with parallel walls and measure the transit time across the resulting fixed sound path between the inside walls of the container. The transit time measurement can be done with any one of a number of ultrasonic instruments. Maybe you can provide a few more details about the circumstances of your test.

: --Tom Nelligan
: Panametrics, Inc.

It is really not difficult to measure the sound velocity, unless you don´t need a very high precision (it could be for example important, if you want to measure weak solutions etc.).
For high accuracy measurements you will need equipment with higher time measurement precision as typically used and it could be necessary to compensate the wall effects, diffraction effects etc.

Wieslaw Bicz

Optel (http://www.optel.com.pl)


    
 
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chittakorn Polyon
chittakorn Polyon
08:07 Dec-12-1999
Re: Sound velocity in water
: Does anybody have any information about how to determine sound velocity in water at elevated teperatures. Temperatures would be greater than the boiling point at atmospheric pressures.




    
 
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Oscar Fernando Cota Monjaras
Oscar Fernando Cota Monjaras
03:02 Jun-24-2000
cylinder vibrating modes
Hi.

Can anybody give me the formula for calculating the vibrating modes of a cylinder?

Thank you. Oscar Cota


    
 
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