Accession Number : ADA264473


Title :   Fort Peck Tunnel No. 1 Rehabilitation, Fort Peck Dam, Montana


Descriptive Note : Final rept.


Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB


Personal Author(s) : Tate, Jr , Charles H ; McGee, Richard G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264473.pdf


Report Date : Mar 1993


Pagination or Media Count : 54


Abstract : The existing trifurcation and penstock system at Fort Peck Dam, Montana, is reaching the end of its design life and has been determined to have an unacceptable factor of safety. A proposed replacement trifurcation designed by Sulzer Escher Wyss was model tested to determine the flow conditions through the trifurcation and the energy losses associated with various flow combinations. Differential pressures measured across the trifurcation were used with an automated data collection system to determine the losses through the various segments of the trifurcation. Spot pressures were also collected within the trifurcation to determine the stability of the flow fields as they separated to pass through different penstock outlets. The proposed trifurcation was found to be acceptable; however, the energy losses were greater than anticipated based on design information. The existing control section located upstream of the trifurcation was studied to determine if simple modifications could reduce energy losses through the control section. The emergency gate slots were determined to cause the highest energy losses through the control section. Filling the emergency gate slots with an insert would significantly reduce the energy loss through the control section. Control section energy loss, Sulzer Escher Wyss trifurcation, Energy loss measurement, Trifurcation, Fort Peck Dam, Trifurcation replacement.


Descriptors :   *WATER TUNNELS , *DAMS , CONTROL , MEASUREMENT , STABILITY , WATER FLOW , EMERGENCIES , MODELS , MODIFICATION , ENERGY , FLOW FIELDS , INSERTS , REPAIR , PRESSURE , SAFETY , SLOTS , REPLACEMENT , LOSSES , MONTANA


Subject Categories : Civil Engineering
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE