A novel approach to propellant pressurization for microscale rocket engines is introduced. The Giffard injector is shown to be a viable alternative to turbomachinery for pressurizing the liquid propellants on board a microrocket, offering a design free of moving parts. Extending the authors’ previous work, the engine performance is computed for several fuel/oxidizer combinations. A large-scope study of the heat transfer throughout the regenerative cooling engine cycle examines the effects of combustion chamber pressure and engine size on performance. A boiler is designed that facilitates the heat transfer required for adequate cooling and is modeled using the effectiveness-number of transfer units method. The computed specific impulse and thrust-to-weight ratio of the design for the propellants considered are roughly 250 s and 2000, respectively. The power density of the proposed injector-pumped design is seen to behave like that of turbopumped microrockets up to a critical nozzle throat diameter of approximately 1 cm, beyond which the advantages of an entirely static structure are outweighed by decreasing performance.

References

References
1.
London
,
A.
, 1996,
“A Systems Study of Propulsion Technologies for Orbit and Attitude Control of Microspacecraft,”
Master’s thesis
,
Massachusetts Institute of Technology
,
Cambridge, MA
.
2.
Marcu
,
B.
,
Prueger
,
G.
,
Epstein
,
A.
, and
Jacobsen
,
S.
, 2005,
“The Commoditization of Space Propulsion: Modular Propulsion Based on MEMS Technology,”
41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
,
AIAA
.
3.
Liu
,
L.
,
Teo
,
C.
,
Epstein
,
A.
, and
Spakovszky
,
Z.
, 2005,
“Hydrostatic Gas Journal Bearings for Micro-Turbomachinery,”
ASME J. Vib. Acoust.
,
127
(
2
), pp.
157
164
.
4.
Giffard
,
H.
, 1858,
“Improved-Feed Water Apparatus for Steam-Boilers,”
U.S. Patent No. 27979.
5.
Nissenson
,
G.
, 1890,
Practical Treatise on Injectors as Feeders of Steam Boilers
, published by the author.
6.
Kneass
,
S.
, 1910,
Practice and Theory of the Injector
,
Wiley
,
New York
.
7.
Brikner
,
N.
,
Gardner
,
W.
,
Shen
,
H.
, and
Protz
,
J.
, 2010,
“A Study and Design of a Giffard Injector-Pumped Bipropellant Microrocket,”
The 57th Joint Army-Navy-NASA-Air Force (JANNAF) Propulsion Meeting
,
JANNAF
.
8.
Lang
,
J. H.
, ed., 2009,
Multi-Wafer Rotating MEMS Machines
,
Springer
,
New York
.
9.
Cengel
,
Y.
, and
Ghajar
,
A.
, 2011,
Heat and Mass Transfer: Fundamentals and Applications
,
4th ed.
,
McGraw-Hill
,
New York.
10.
Lide
,
D.
, ed., 2009,
Handbook of Chemistry & Physics
,
90th ed.
,
CRC
,
Hoboken, NJ.
11.
Rocketdyne
, 1967,
“Hydrogen Peroxide Handbook,” Rocketdyne Chemical and Material Sciences Department Research Division
, Technical Report No. AFRPL-TR-67-144.
12.
Sutton
,
G.
, 1994,
Rocket Propulsion Methods
,
6th ed.
,
Wiley
,
New York
.
13.
Protz
,
C.
, 2000,
“Systems Analysis of a Microfabricated Storable Bipropellant Rocket Engine,”
Master’s thesis
,
Massachusetts Institute of Technology
,
Cambridge, MA
.
14.
Sutton
,
G.
, and
Biblarz
,
O.
, 2010,
Rocket Propulsion Elements
,
8th ed.
,
Wiley
,
New York
.
15.
Greitzer
,
E.
,
Tan
,
C.
, and
Graf
,
M.
, 2004,
Internal Flow
,
Cambridge University Press
,
New York
.
16.
Shah
,
R.
, and
Sekulić
,
D.
, 2003,
Fundamentals of Heat Exchanger Design
,
Wiley
,
New York
.
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