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https://hdl.handle.net/11681/13200| Title: | Morning glory inlet and manifold outlet structure, McCook Reservoir, Chicago, Illinois : hydraulic model investigation |
| Authors: | United States. Army. Corps of Engineers. Chicago District Fletcher, Bobby P. |
| Keywords: | Air entrainment (water) Hydraulic models Manifold McCook Reservoir, Chicago, Illinois Flow characteristics Intake structures Hydraulic structures Shaft spillways Vortex |
| Publisher: | Hydraulics Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Technical report (U.S. Army Engineer Waterways Experiment Station) ; HL-91-11. |
| Description: | Technical Report Abstract: A 1:20.7-scale model of the morning glory intake for the McCook Reservoir Inlet, Chicago, IL, was used to develop and investigate a design that would provide satisfactory hydraulic performance. Tests were conducted to investigate the relationship between discharge, pool elevation, hydraulic gradient, and air entrainment in the discharge conduit. Tests indicated that air entrainment occurred only when the water surface was below the bottom of the cover plate. This air entrainment could be eliminnt d by reducing the discharge to below 550 cfs. Pressure measurement in the structure enabled the computation of losses and indicated no tendency for cavitation for any anticipated flow condition. A 1:40-scale model of the manifold outlet permitted evaluation and documentation of flow conditions in the wheel gate structure and manifold. Pressure measurements indicated no tendency for cavitation. Manifold loss coefficients for various discharges were obtained. The distribution of flow exiting the manifold via 45 ports and the magnitude and direction of flow in the primary basin were documented. The models indicated that for any potential flow conditions, satisfactory hydraulic performance should be anticipated. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/13200 |
| Appears in Collections: | Technical Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| TR-HL-91-11.pdf | 4.49 MB | Adobe PDF |  View/Open |