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Numerical investigation of vibration in a steam turbine control valve.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Numerical investigation of vibration in a steam turbine control valve./
作者:	Novak, Luke Michael.
面頁冊數:	1 online resource (194 pages)
附註:	Source: Masters Abstracts International, Volume: 56-02.
標題:	Mechanical engineering. -
電子資源:	click for full text (PQDT)
ISBN:	9781369504507

Numerical investigation of vibration in a steam turbine control valve.
Novak, Luke Michael.

Numerical investigation of vibration in a steam turbine control valve. - 1 online resource (194 pages)

Source: Masters Abstracts International, Volume: 56-02.

Thesis (M.S.)--North Dakota State University, 2017.

Includes bibliographical references

A numerical analysis is performed at North Dakota State University to investigate and resolve steam inlet control valve vibration in a Minnkota Power Cooperative turbine. Pressure fluctuations resulting from an unstable flow pattern are found to cause vibration. Multiple valve disc and seat design modifications to stabilize the flow are made and tested. The full scale geometry is used with steam as the working material. Both steady-state and transient analyses are completed. Analytical calculations are used for verification. Investigation of all modifications is discussed. Results from the original valve configuration show vortex shedding off of the disc. A currently installed cutoff disc has not removed flow-induced vibration. Flow expansion generates unstable flow, creating an unsteady separation bubble on the valve seat at the throat exit. Changing the throat from a converging-diverging to a purely converging nozzle stabilizes the flow, removing the flow-induced pressure forces causing disc vibration.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369504507Subjects--Topical Terms:

557493
Mechanical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Numerical investigation of vibration in a steam turbine control valve.
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100 1 $a Novak, Luke Michael. $3 1148480
245 1 0 $a Numerical investigation of vibration in a steam turbine control valve.
264 0 $c 2017
300 $a 1 online resource (194 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 56-02.
500 $a Adviser: Bora Suzen.
502 $a Thesis (M.S.)--North Dakota State University, 2017.
504 $a Includes bibliographical references
520 $a A numerical analysis is performed at North Dakota State University to investigate and resolve steam inlet control valve vibration in a Minnkota Power Cooperative turbine. Pressure fluctuations resulting from an unstable flow pattern are found to cause vibration. Multiple valve disc and seat design modifications to stabilize the flow are made and tested. The full scale geometry is used with steam as the working material. Both steady-state and transient analyses are completed. Analytical calculations are used for verification. Investigation of all modifications is discussed. Results from the original valve configuration show vortex shedding off of the disc. A currently installed cutoff disc has not removed flow-induced vibration. Flow expansion generates unstable flow, creating an unsteady separation bubble on the valve seat at the throat exit. Changing the throat from a converging-diverging to a purely converging nozzle stabilizes the flow, removing the flow-induced pressure forces causing disc vibration.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Mechanical engineering. $3 557493
650 4 $a Energy. $3 784773
655 7 $a Electronic books. $2 local $3 554714
690 $a 0548
690 $a 0791
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a North Dakota State University. $b Mechanical Engineering. $3 1148481
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10252647 $z click for full text (PQDT)