1. MODELING FLOW IN LOCK MANIFOLDS
Richard L. Stockstill, Jane M. Vaughan, and E. Allen Hammack
U.S. Army Engineer Research and Development Center
Coastal and Hydraulics Laboratory

2. Evaluation of Lock Manifolds
Hydraulic design of navigation locks depends on knowledge of the performance of particular components.
Performance measures are often times quantified with coefficients such as discharge coefficient or energy loss coefficient.
Lock components are such things as manifolds, gates, and valves.
Manifolds vary in function from intakes to filling and emptying manifolds to outlets.

3. Longitudinal Culvert System
Filling and Emptying Manifolds
In-Chamber
Longitudinal Culvert System
Side-Port System

4. Common Manifolds Culvert Locations for the Side-Port and
ILCS Filling and Emptying Systems

5. Computational Model of Webbers Fall Lock– Arkansas River
Narrative describing process and criteria for organization, coordination, and development decisions 5

6. Physical and Numerical Models
Computational Model of Cannelton Lock – Ohio River
Physical and Numerical Models
Narrative describing process and criteria for organization, coordination, and development decisions 6

7. Calculations

8. Loss Coefficients

9. ILCS Single Port Laboratory Tests
Port A
Port B

10. ILCS Single Port Computational Model
Simulated what was previously
Tested in a Physical Model 10

11. Single Port Computational Model
Computational Mesh
Velocity Contours 11

12. ILCS Port Single Port Loss Coefficients: Numerical and Laboratory
Model Results
Narrative describing process and criteria for organization, coordination, and development decisions
Turbulence Models:
k-e and k-w results compared well with lab data
k-e realizable gave loss coefficients that were an order of magnitude higher than lab data 12

13. Physical Model Manifold Data Lock 25 Wall Manifold (Left Wall)
Narrative describing process and criteria for organization, coordination, and development decisions
1/8 in. diameter pitot tube
(Dwyer Instruments model 166) 13

14. Lock 25 Single Port Loss Through Port Culvert Velocity Head
Loss Across the Port Culvert Velocity Head
Loss Through Port Port Velocity Head

15. Results

16. Conclusions
Loss coefficients can be determined using detailed 3D computational models.
Calculation of flow in lock manifolds using energy equations relies on accurate loss coefficient data.
Problem is very nonlinear because the coefficients are dependent on an unknown variable, velocity (which is nonlinear).
Understanding of effective use of 3D computational models is on-going

17. Questions?
Narrative describing process and criteria for organization, coordination, and development decisions 17