Appendix A Glossary
The nomenclature used in the preceding text basically is that presented in "Solid Propulsion Nomenclature Guide" (ref. 135). The guide should be reviewed for complete coverage of recommended solid propulsion symbols and subscripts; only those used in this monograph are presented below.
Symbol Definition Appears in
a blowing rate constant eq. (8)
B empirical constant eq. (4)
B' blowing rate parameter eq. (8)
Cp del delivered thrust coefficient eq. (2)
C f vac vacuum thrust coefficient with no divergence loss eq. (2)
CVD chemical vapor deposition text
D inside diameter of part being tape wrapped, in. eq. (7)
Dt throat diameter of nozzle being designed, in. eq. (3)
Dtm throat diameter of nozzle in which erosion rate eq. (3) was measured, in.
HGTVC hot gas thrust vector control text ksi 1000 psi tables II, III, and IV
L throat-to-exit length, in. fig. 27
LITVC liquid injection thrust vector control text
L/Rt ratio of throat-to-exit length to throat radius fig. 27
»Divided into three sections: Symbols, Material Designations, and Organization Abbreviations.
MEOP
Pamb
Q Rt st StD
empirical constant maximum expected operating pressure of motor, psi nondestructive testing ambient pressure, psi chamber pressure, psi chamber pressure of motor in which nozzle erosion rate was measured, psi theoretical static pressure of exhaust gas at exit plane, psi cold wall heat flux, Btu/(ft2-sec) nozzle throat radius, in. local Stanton number Stanton number for zero blowing thickness allowed for erosion, in.
fig. 27
parameter ta -te te expected erosion depth, in.
parameter t9 -t.
thrust vector control tape width, in. char depth, in.
nozzle-divergence half-angle, deg ratio of specific heats expansion ratio text eq.(7)
fig. 27
firing diiration, sec divergence loss factor, X =
1 + cos a tape-wrapping-capability index eqs.(4),(5),and(6) eqs. (1) and (2) eq.(7)
Material1 AP C-103 Dacron elastomer epoxy
Freon 114-B2
Haynes alloy
HMX Kevlar
NBR NC
1 Additional information on metallic materials herein can be found in the 1972 SAE Handbook, SAE, Two Pennsylvania Plaza, New York, N.Y.; in MIL-HDBK-5B, Metallic Materials and Elements for Aerospace Vehicle Structures, Dept. of Defense, Washington, D.C., Sept. 1971 ; and in Metals Handbook (8th ed.), Vol. 1 : Properties and Selection of Metals, Am. Society for Metals (Metals Park, Ohio) ,1961.
Identification ammonium Perchlorate columbium-based alloy containing Hf, Ti, and Zr trade designation of E.I. duPont de Nemours & Co. for a polyester fiber made from polyethylene terephthalate polymerical material that at room temperature can be stretched to approximately twice its original length and on release return quickly to its original length thermosetting resin widely utilized as an adhesive and as a binder in the fabrication of glass-filament/resin composites trade designation for dibromotetrafluoroethane manufactured by E.I. duPont de Nemours & Co.
designation of certain cobalt- and nickel-base high-temperature alloys manufactured by Stellite Division of Cabot Corporation cyclotetramethylene tetranitramine trade designation for an aromatic polyamide fiber manufactured by E.I. duPont de Nemours & Co.
butadiene acrylonitrile rubber nitrocellulose
Identification nitroglycerine (C3HS(0N02)3), an oily explosive liquid obtained by nitrating glycerol
N204, propellant grade per MIL-P-26539
generic name for a family of polyamide polymers polybutadiene-acrylic acid polymer polybutadiene-acrylic acid-acrylonitrile terpolymer carboxy-terminated polybutadiene (also abbreviated as CTPB)
polyurethane, any of various polymers that contain -NHCOO- linkages any of a group of smooth textile fibers made in filament and staple form from regenerated cellulose or other cellulosic material an elastomer, either a synthetic or a natural compound obtained from the hevea brasiliensis tree trade designation of The Dow Chemical Co. for expanded cellular polystyrene alloy consisting of 90% tantalum and 10% tungsten titanium-aluminum-vanadium alloy per AMS 4906 iron-nickel alloy processed to achieve 200 ksi tensile strength tungsten possessing 90% of the density of the extruded or forged form
ORGANIZATIONS
Air Force Ballistic Missiles Divison Air Force Flight Dynamics Laboratory Air Force Materials Laboratory
AFRPL Air Force Rocket Propulsion Laboratory
AIAA American Institute of Aeronautics and Astronautics
AIChE American Institute of Chemical Engineers
ARPA Advanced Research Projects Agency
ARS American Rocket Society (now part of AIAA)
ASCE American Society of Civil Engineers
ASD Aeronautical Systems Division
Wright-Patterson Air Force Base
ASME American Society of Automotive Engineers
BSD Ballistic Systems Division
(Division of SAMSO)
CPIA Chemical Propulsion Information Agency
ICRPG Interagency Chemical Rocket Propulsion Group
IFP Institute of Fluid Power
JANAF Joint Army-Navy-Air Force
JANNAF Joint Army-Navy-NASA-Air Force
JPL Jet Propulsion Laboratory
(California Institute of Technology)
LPIA Liquid Propulsion Information Agency
NAA North American Aviation Corp.
NOL Naval Ordnance Laboratory
SAE Society of Automotive Engineers
SAMSO Space & Missile Systems Organization
WADD Wright Air Development Division
Wright-Patterson Air Force Base
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