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Produced by the NASA Center for Aerospace Information (CASI)
April 10, 1984

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sEV 1984

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Richard C. Farmer

NASA Projects Director

CONTINUUM, INC.

4715 UVi\Fw.Sl fv DH vF. Svi1E 1 18

H- 141SVILlt-. Ai AHAMA 35805

t 205 1837 9310

National Aeronautics and Space Administration

George C. Marshall Space Flight Center

ATTN: ED14/Harbison

Marshall Space Flight Center, AL 35812

Dear Mr. Harbison:

Enclosed is the Monthly Progress Report (original and six copies) for the period of March

1 - March 31, 1984, in compliance with the requirements of Contract No. NAS8-35508.

Distribution of this report has been made as noted below. If you have any questions,

please do not hesitate to contact me.

Very truly yours,

E nc.

Distribution: AP29-F AS24D (3)

ATO1 EM 13B-11

DC AS M A

NASA Scientific and Technical Information Facility

(NAS A-CLt- 17 11 14) CJMirU1A'I1(,NAL FLUA.J N84- 31553

liECUASICS UTILi2iN,i TdL VAIIA1iuNAL

PRINCIPLL GI• MULELING Li,liiNu iLALS 6ontu y

Frogress hepurt, 1 r1ai. - ::1 Mar. 1 984 11n.cia:

(Continuum, 111C.) 3 p I,C A011l;r AU1 GJ/34 UC73z
COMPUTATIONAL FLUID MECHANICS UTILIZING

THE VARIATIONAL PRINCIPLE OF MODELING DAMPING SEALS

Monthly Progress Report, Contract No. NAS8-35508

for March 1 - 'March 31, 1984

Prepared for: 

National Aeronautics and Space Administration

George C. 'Marshall Space Flight Center

Marshall Space Flight Center, AL 35812

By:

T Continuum, Inc.

4715 University Drive, Suite 118

Huntsville, AL 35805

April 10, 1984

- --^- .^-
`IONTHLY PROGRESS REPORT, Contract No. NAS8-35508 (For the period of March 1 -

Warch 31, 1984).

Objecti ve:

The objective of this research is to develop and verify a computational fluid mechanics

model which simulates the damping seals that are being considered for use in the SSME

turbom achinery.

Work performed during this reporting period:

The pressure solution for incompressible flow is still under study. Of several models

investigated, two have been identified as the most promising for 3 -dimensional, timedependent problems. One is an implicit solution of the mechanical energy equation, and

the second is the use of artificial compressibility modified for a time-accurate solution.

The compatibility of these solutions with the variational principle is iiso being studied.

Work to be performed during next reporting period:

The two presure models that have been selected are to be studied further. These will be

programmed into the VARI code. The method of solving the momentum and continuity

equations, since one momentum equation is no longer used for pressure, will also be

examined

Current Problems:

No problems which would preclude the timely completion of this study have been

encountered to date.

Total cumulative eVenditures incurred as of this date:

Total cumulative costs incurred from contract inception through the end of this reporting

period are: $ 20,304 representing 16% of the costs allocated for this study.

Estimated percentage of physical completion of contract:

Of the man hours allocated for this study, 16% have been expended, and 16% of the

physical effort has been completed.

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