NESC0278 WHAM6

1. NAME OR DESIGNATION OF PROGRAM:  WHAM6

3. DESCRIPTION OF PROBLEM OR FUNCTION

WHAM6 is used to calculate pressure and velocity transients in liquid-filled piping networks. It can be applied to multiloop complex piping networks consisting of dead ends, elbows, orifices, multiple-branch tees, changes of flow passage cross section, check valves, pumps, pressurizers or tanks, and exit valves or breaks. Hydraulic losses are considered. Transients can be initiated either by closure or opening of one or more exit valves (equivalent to system ruptures) or by a prescribed  gas pressure history in a pressurizer tank.

4. METHOD OF SOLUTION

The unsteady fluid motion is described by the set of mass, momentum, and energy conservation laws, the equation of state for the fluid, and the initial and boundary conditions for  all dependent variables. The well-known water-hammer equations for liquid-filled pipes are then evaluated by use of the wave superposition method. The frictionless case may be considered if desired.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of -
   100 legs (see item 14)
    50 nodes per leg (see item 14)
2 different valves or breaks (additional ones have the        properties of the second one)
     4 pumps
     1 pressurizer
     1 case per execution
Turbine operation range is not considered because it is assumed that each pump is provided with a check valve.

6. TYPICAL RUNNING TIME

To compile and execute the sample problem: 3 minutes (IBM370/195), 40 CP seconds (CDC7600).

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS

WATER-HAMMER, WHAM, WHAM2, BURST (NESC Abstract 435), and BAM. WATER-HAMMER, WHAM, and WHAM2 are earlier editions of WHAM6. S. Fabic developed the original WATER- HAMMER program at Kaiser Engineers. WHAM was prepared at Kaiser Engineers as a successor to WATER-HAMMER, and converted to the IBM360 at the University of Missouri-Columbia. The WHAM2 edition was written at Aerojet Nuclear Company.

- Stanislav Fabic:
WHAM, Computer Program for Calculation of pressure, velocity, and force
transients in liquid filled piping networks
Report No. 67-49-R, November 1967
- V.T. Berta:
WHAM/MOD-006 Summary
Aerojet Nuclear Company (December 11, 1975).
- Argonne Code Center Programming Note 76-24
WHAM6, ACC No.278.360, 278.6600 (March 3, 1976)

11. MACHINE REQUIREMENTS

480K bytes of memory (IBM370/195), 101,000 (octal) words (CDC7600).

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  OS/360,370
(IBM360,370), SCOPE 2.1.3 (CDC7600).

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

   The
package as distributed provides for maxima of 100 legs and 50 nodes  per leg. These limits are imposed by DIMENSION and DATA statements,  and can be changed to accommodate other models whenever memory space is available. Applications using 244 legs, 26 nodes per leg, for the hydraulic model have been completed at EG&G.

15. NAME AND ESTABLISHMENT OF AUTHORS

   360 WHAM6     V. T. Berta
                 EG&G Idaho, Inc.
                 P. O. Box 1625
                 Idaho Falls, Idaho  83401
   7600 WHAM6    H. Edwards
                 National Energy Software Center
                 Argonne National Laboratory
                 9700 South Cass Avenue
                 Argonne, Illinois  60439

File name	File description	Records
NESC0278_01.001	INFORMATION	3
NESC0278_01.002	SUBROUTINE 'DATE' (ASSEMBLER)	66
NESC0278_01.003	SOURCE PROGRAM (F4)	1379
NESC0278_01.004	JCL FOR THE SAMPLE PROBLEM	26
NESC0278_01.005	SAMPLE PROBLEM INPUT DATA	56
NESC0278_01.006	SAMPLE PROBLEM PRINTED OUTPUT	570
NESC_278_1_V1.pdf	WHAM manual	4145
NESC_278_1_V2.pdf	WHAM-6 summary	556
NESC_278_1_V3.pdf	WHAM6 Note	70