Combustion of frozen nanoaluminum and water mixtures

Grant Alexander Risha, Terrence Lee Connell, Jr., Richard A. Yetter, Dilip S. Sundaram, Vigor Yang

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Steady-state strand burner and laboratory-scale static fire motor experiments were used to determine the relative performance and viability of an environmentally friendly solid propellant composed of only nanoaluminum and frozen water. The nominal size of the nanoaluminum particles was 80 nm. The particles were homogeneously mixed with water to form pastes or colloids and then frozen. The measured parameters include burning rates, slag accumulation, thrust, and pressure. A system scaling study was performed to examine the effect of the size of the smallscale motors. The equivalence ratio was fixed at 0.71 for the strand burner and the laboratory-scale motor experiments. The effect of pressure on the linear burning rate was also examined. For an equivalence ratio of 0.71, the mixture exhibited a linear burning rate of 4.8 cm/s at a pressure of 10.7 MPa and a pressure exponent of 0.79. Three motors of internal diameters in the range of 1.91-7.62 cm were studied. Grain configuration, nozzle throat diameter, and igniter strength were varied. The propellants were successfully ignited and combusted in each laboratory-scale motor, generating thrust levels above 992 N in the 7.62-cm-diam motor with a center-perforated grain configuration (7.62 cm length) and an expansion ratio of 10. For the 7.62 cm motor, combustion efficiency was 69%, whereas the specific impulse efficiency was 64%. Increased combustion efficiency and improved ease of ignition were observed at higher chamber pressures (greater than 8 MPa).

Original languageEnglish (US)
Pages (from-to)133-142
Number of pages10
JournalJournal of Propulsion and Power
Volume30
Issue number1
DOIs
StatePublished - Jan 1 2014

Fingerprint

combustion
burning rate
water
Water
combustion efficiency
thrust
burners
Fuel burners
strands
equivalence
colloid
igniters
slag
solid propellants
specific impulse
Solid propellants
pressure chambers
throats
viability
slags

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Fuel Technology
  • Mechanical Engineering
  • Space and Planetary Science

Cite this

Risha, Grant Alexander ; Connell, Jr., Terrence Lee ; Yetter, Richard A. ; Sundaram, Dilip S. ; Yang, Vigor. / Combustion of frozen nanoaluminum and water mixtures. In: Journal of Propulsion and Power. 2014 ; Vol. 30, No. 1. pp. 133-142.
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Combustion of frozen nanoaluminum and water mixtures. / Risha, Grant Alexander; Connell, Jr., Terrence Lee; Yetter, Richard A.; Sundaram, Dilip S.; Yang, Vigor.

In: Journal of Propulsion and Power, Vol. 30, No. 1, 01.01.2014, p. 133-142.

Research output: Contribution to journalArticle

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