i sts-1 nominal · msfg memo ed33-80-10, "design assessment sts-1 base heating environment...

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(N AS A-CR-161629) STS-1 NUtlTNAL CYCLE 3 N81-15U15MARCH/APRIL LtUNCH, -0S-CENT BASE CUNVEGT.IVEHEATING ENVIRONNEN 'S Final Report (Remtech,Inc., Hu ► .tsvi.11e, Ala.) 50 p HC A03/MF AU1 Unclas

CSCL 22B G3/lo 19719i

STS-1 NOMINALCYCLE 3 MARCH/APRIL LAUNCH

ASCENT BASE CONVECTIVE HEATING ENVIRONMENTS

Robert Lee Bender, Jr.

Young C. Lee

CAZ)^' FEB 1Ee1

RECEIVEDN NASA STI FACIUTy

ACCESS DEpT.

November 24, 1980

Final ReportFor

Contract NAS8-33725

For

National Aeronautics and Space AdministrationGeorge C. Marshall Space Flight Center

Marshall Space Flight Center, Alabama 35812

RE=-:MTF=n e-s ;

https://ntrs.nasa.gov/search.jsp?R=19810006500 2018-06-11T00:10:21+00:00Z

a

RTR 047-2

'UM►iA, Y

Ascent base convective heating environments have been determined for the

nominal ascent trajectory for the STS-1 C''ycle 3 March/April launch period,

Reference 1. Both first and second stage environments are defined for all

base heating DFI locations and design body points of interest. An identical

format to the STS-1 dispersed trajectory environment, Reference 2, was followed

throughout.

As expected, STS-1 nominal environments are generally less severe than

those determined for the high loft and low loft dispersed trajectory conditions.

The reduction in cold wall heating with the nominal trajectory varies for each

base location analyzed, but, in general, was approximately twenty (20) percent.

RFFERENCES

1. R. I. Internal Letter SAS/MR&I-79-724, "STS-1 Cycle 3 March/AprilLaunch Ascent Trajectories (EMS Milestone 790-700-207)," datedFebruary 14, 1980.

2. MSFG Memo ED33-80-10, "Design Assessment STS-1 Base HeatingEnvironment (March 30, 1980 Launch Trajectory)," dated March 12, 1980.

^ F

STS-1 NOMINAL

FIRST STAGE CONVECTIVE BASE HEATING ENVIRONMENT

TO DFI LOCATIONS AND SELECTED DESIGN BODY POINTS

r

STS-1 Nominal

Cycle 3 March/April Launch

a4-

°0 100

I

(UV80

r'

0 20 40 60 80 100 120

Flight Tiaue M Seconds

Figure 1. STS - 1 Nominal Trajectrry -- Cycle 3 March/April Launch

180'

160

140

120

60

40

20

Ref. R.I. Internal Letter SAS/MR&I 79 724 t

- Hr.,

v ^ l ! is

P,

1.. i; t;` t { tt

140

4000S- T 'S - Nomin

-a'1 0--

ase Gass Recovery Temperature ilia_.'T"'S " ^'" ''

f_t.:nrµ't _ t -" t

PodI Orbiter Base, SSME's, OMS........ Vertical Tail, Upper Body Flap 't , I

(Figures 4 through 24) :I t ` . t=

__^. _ .. ,.. I^

!t' I, . lit !if l i t ! 1I? ...._..

t i 9 ^. i9i :ti ;t :f •r

ET LH2 DOme, SRB's, Attach ( { '. ` `'Structure, Lower Body Flap + !^ t t9

(Figures 25 through 42)

IV. -

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0

t 2000v4)

t`

1600

1200

8 0 10 .

400•

060 70 80 90 100 110 120

Flight Time - Secor 4s

Figure 2, STS-1 Nominal First Stage Base Gas Recovery Temperature

130

` r r

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Flight Time - Seconds

60 70

.. .... .... ..4' 1

. . . . . . . . . .

. . . . . . . . . . . . . . . . . . .

Appl icabl eBase Region

to a].Surfaces

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r1gure 3. STS-1 Nominal First Stage Convective Base Heating Environment -Prior to Recirculation

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STS-1 Flight Time Seconds

Figure 4. STS-1 First Stage Convective Base heating Environment -Orbiter Neat Shield

4

150

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70 80 90 100 110 120 130 140 150STS-1 Flight Time Seconds

Figure 5. STS-1 First Stage Convective Base Heating EnvironmentOrbiter Heat Shield

1%

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STS-1 Flight Time - Seconds

Figure 6. STS-1 First Stage Convective Base bleating Environment -Orhiter Heat Shield

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STS-1 NOMINALCYCLE 3 MARCHIAPRIL LAUNCH - ° ..

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Figure 7. STS-1 First Stp -ie Convective Base Heating Environment -Orbiter Heat Sh'eld

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STS-1 NOMINAL' CYCLE. 3 14ARCH/APRIL LAUNCH

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70 80 90 100 110 120 130 140 150

1 101.1NAL PAGE IS STS-1 Flight Time - SecondsrluAl'1 Figure 8. STS-1 First Stage Convective Base Heatirg Environment -

Orbiter Heat Shield

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STS-1 First Stage Convective Base Heating Environment -Orbiter Heat Shield

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_.._._:_ ...._._ .:.. CYCLE 3 MARCH/APRIL LAUNCH ---

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80 90 100 110 120 130 140 150


Figure J.O.

STS-1 First Stage Convective Base Heating Environment - SSME #1

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STS=-1 NOMINAL {MARCH/APRIL LAUNCHi CYCLE 3 MA

{ (

r r

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- 7561 (AFT)a 7591 (AFT)

_..., .. ..._.. ^. (TOP) I! t { .^

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70

80 90 100 110

120 130 140 150


Figure 11.

STS-1 First Stage Convective Ease Heating Environment - SSME #1

I.

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^. SSME #.1. f.

`` ! i 1 r

^ ve -; OESTGN PT 7195 . i .... +^ ....

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ULSIGN PTS

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j I STS-1 NOMINALt CYCLE 3 MARCH/APRIL LAUNCH -^-

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STS-1 NOMINAL iCYCLE 3 MARCH/APRIL LAUNCH

1

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Figure 13 ST'S-1 First Stage Convective Base Heating Environment - SSME #1

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Figure la STS-1 First Stage Convective Base Heating Environment - SSME X12

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STS-1 NOMINALCYCLE 3 14ARCH/APRIL LAUNCH

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Figure 17 .

._ _-,.—__ _ _. ,r—

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STS-1 First Stage Convective Base Heating Environment - Vertical Tail

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Figure 18, STS-1 First Stage Convective Base Heating Environment OMS Pod

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STS-1 Flight Time _. Seconds

Figure 19. STS-1 First Stage Convective Base Heating Environment - OMS Pod

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Figure 20. STS-1 First Stage Convective Base Heating Environment - OMS Pod

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STS-1 Flight Time - Seconi.s

Figure 2;1. STS-1 First Stage Convective Base Heating Environment - OMS Pod

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STS-1 NOMINALCYCLE 3 MARCN/APRIL LAUNCH

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70 80 90 100 110 120 130 140 150


Figure 22, STS-1 First Stage Convective Base Heating Environment - OMS Pod

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Figure 23. STS-1 First Stage Convective Base Heating Environment - Body Flap

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Figure 25. STS-1 First Stage Convective Base Heating Environment - Body Flap

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STS-1 NOMINAL

SECOND STAGE CONVECTIVE BASE HEATING ENVIRONMENT

TO DFI LOCATIONS AND SELECTED DESIGN BODY POINTS

STS-1 NOMINAL

ORBITER INSTRUMENTATION LOCATIONS

HEAT TRANSFER COEFFICIENT X 1000 0 BTU/FT2SEC°R

INSTRUMENT BODY FLIGHT TIME, SECONDSPOINT

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HEAT SHIELD

1.70 1.70 1.70 1.70 1.70 1.30 1.20V07T9533-34 9639535-36 925 0.27 0.26 0.25 0.28 0.36 0.43 0.459537-8 905 1.02 1.00 0.98 1.04 0.95 0.78 0.809539-43 909 0.11 0.11 0.11 0.11 0.11 0.09 0.089544-48 0.28 0.27 0.27 0.28 0.30 0.26 0.249549-53 925 0.27 0.26 0.25 0.28 0.36 0.43 0.459554-55 0.75 0.67 0.65 0.79 0.80 0.68 0.729556-60 905 1.02 1.00 0.98 1.04 0.95 0.78 0.809561-65 941 2.04 2.04 2.06 2.06 1.68 0.91 0.849566-70 945 1.93 2.1'.11 2.04 1.91 1.40 0.96 0.739571-75 962 1.21 1.10 1.07 1.24 1.44 1.62 1.589576-77 923 0.42 0.39 0.39 0.44 0.53 0.59 0.63

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OMS-RCS POD

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STS-1 NOMINAL

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BODY POINT FLIGHT TIME, SECONDS

131.4 200 300 400 453.7 496 512.8

HEAT SHIELD

0.450.92

0.450.95

0.450.96

0.450.92

0.440.87

0.340.59

0.290.48

914960

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2.122.47

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2.232.65

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1.551.35

1.251.18

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236239

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0.140.10

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-Z VERN I ER,

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STS-1 NOMINAL

SSME I NSTRUMENTATION LOCATIONS

HEAT TRANSFER COEFFICIENT X 1000, BTU/FT 2SEC°R

INSTRUMENT BODY FLIGHT TIME, SEOPOJDSPOINT

131.4 200 300 400 453.7 496 512.8

SSME NO. 1

1.66 1.66 1.70 1.81 1.88 1.55 1.42E41119117,19 71889120,22 748b 1.06 1.06 1.13 1.34 1.55 1.73 1.669124,26 0.38 0.39 0.41 0.45 0.51 0.52 0.509125 0.45 0.46 0.48 0.53 0.61 0.62 0.59

9135,37 0 39 7481 11.79 11.72 11.72 11.87 12.02 9.78 8.919140,41,42 7581 17.30 17.77 17.92 17.31 16.63 12.36 10.80

SSME NO. 2

0.66 0.61 0.59 0.67 0.80 0.68 0.61E41R9217,19 72489220,22 7748 1.07 0.98 0.96 1.09 1.30 1.11 0.999224,26 7848 0.49 0.45 0.45 0.50 0.60 0.51 0.469237,39 7741 1.68 1.62 1.59 1.69 2.03 2.44 2.809240,42 7841 0.82 0.79 0.78 0.82 0.99 1.19 1.36

STS-1 NOMINAL

ADDITIONAL SSME BODY POINTS

HEAT TRANSFER COEFFICIENT X 1000, BTU/FT2SEC°R

BODY POINT FLIGHT TIME, SECONDS

131.4 200 300 400 453.7 496 512.8

SSME NO. 1

0.76 0.76 0.76 0.82 0.96 0.98 0.9374677567 0.46 0.46 0.46 0.50 0.58 0.59 0.577585 3.76 3.76 3.76 3.76 3.76 2.98 2.687491 1.47 1.47 1.47 1.14 1.05 0.75 0.59

7591,7561 0.92 0.92 0.92 0.72 0.66 0.47 0.377195 0.62 0.62 0.62 0.62 0.62 0.49 0.44

SSME NO. 2

0.15 0.15 0.15 0.15 0.15 0.12 0.117281,78817781 0.27 0.27 0.27 0.27 0.27 0.22 0.19

t .

i sts-1 nominal · msfg memo ed33-80-10, "design assessment sts-1 base heating environment...

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