Practical Instructions Relating to the Construction And Use of the Steam Engine Indicator
Practical Instructions Relating to the Construction And Use of the Steam Engine Indicator
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In our eReader you can find the full English version of the book. Read Practical Instructions Relating to the Construction And Use of the Steam Engine Indicator Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Practical Instructions Relating to the Construction And Use of the Steam Engine Indicator
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FLOW OF STEAM THROUGH AN ORIFICE The velocity of steam at 100 to 150 pounds pressure, issuing from an orifice into the air, is from 1,300 to 1,500 feet per second. The weight of steam discharged through an orifice with rounded entrance, having 150 pounds abso- lute pressure on the entrance side, will be the same in amount for any back pressure from 90 pounds absolute down. At first sight this does not seem reasonable. The pressure drops at what is called the throat or the smallest section of th...e orifice or nozzle to 0.6 the absolute entrance pressure, provided the back pressure is not over 0.6 of the entrance pressure. Under these conditions, as the throat pressure and the velocity at the throat are the same, the quantity discharged will remain constant during changes in back pressure from 0.6 of the boiler pressure down to zero.
The same is true also for gases.
Digitized by VjOOQlC DESIGN OP A TURBINE NOZZLE 147 Measurement of Dry Steam by the Flow through an Orifice An empirical formula known as Napier's or as Rankine's gives very accurate results.
What to read after Practical Instructions Relating to the Construction And Use of the Steam Engine Indicator?
You can find similar books in the "Read Also" column, or choose other free books by Crosby Steam Gage And Valve Company to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
FLOW OF STEAM THROUGH AN ORIFICE The velocity of steam at 100 to 150 pounds pressure, issuing from an orifice into the air, is from 1,300 to 1,500 feet per second. The weight of steam discharged through an orifice with rounded entrance, having 150 pounds abso- lute pressure on the entrance side, will be the same in amount for any back pressure from 90 pounds absolute down. At first sight this does not seem reasonable. The pressure drops at what is called the throat or the smallest section of th...e orifice or nozzle to 0.6 the absolute entrance pressure, provided the back pressure is not over 0.6 of the entrance pressure. Under these conditions, as the throat pressure and the velocity at the throat are the same, the quantity discharged will remain constant during changes in back pressure from 0.6 of the boiler pressure down to zero.
The same is true also for gases.
Digitized by VjOOQlC DESIGN OP A TURBINE NOZZLE 147 Measurement of Dry Steam by the Flow through an Orifice An empirical formula known as Napier's or as Rankine's gives very accurate results.
What to read after Practical Instructions Relating to the Construction And Use of the Steam Engine Indicator?
You can find similar books in the "Read Also" column, or choose other free books by Crosby Steam Gage And Valve Company to read onlineMoreLess
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