Combustion of aqueous HAN/methanol propellants at high pressures

Ferguson, Robert E.; Esparza, Alan A.; Shafirovich, Evgeny

doi:10.1016/j.proci.2020.06.054

Cited by 13 publications

(5 citation statements)

References 17 publications

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“…Ferguson et al studied an identical aqueous HAN/methanol mixture at pressures 8-30 MPa [10]. Roughly five distinct pressure regimes were identified, in a similar pattern to that in work [9].…”

Section: Introductionmentioning

confidence: 79%

“…Figure 1 shows the obtained dependence of the linear burning rate of gelled aqueous HAN/methanol propellant on absolute pressure. For comparison, the figure also shows the results for an ungelled version of this propellant [10], obtained in the same strand burner. Error bars represent one standard deviation from the average at each pressure.…”

Section: Resultsmentioning

confidence: 99%

“…In the test at 3 MPa, no data was produced as the fuse wires did not break. Apparently, the temperature of the combustion front was not high enough to break the fuse wires, which melted at 318 °C according to the conducted DSC [10].…”

Section: Resultsmentioning

confidence: 99%

“…While HAN itself decomposes exothermically, it is typically used as an oxidizer mixed with a fuel component to increase the specific impulse. Such fuel components include triethanolammonium nitrate (TEAN) [2][3][4], glycine [5], 2-hydroxyethylhydrazinium nitrate (HEHN) [6], and methanol [7][8][9][10]. The present work focuses on the HAN/methanol pair as it is used in SHP163, one of the most promising green monopropellants [11], and there exists a large volume of data on this propellant in the open literature.…”

Section: Introductionmentioning

confidence: 99%

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Combustion of Gelled HAN/Methanol/Water Propellants

Ferguson

Shafirovich

2021

Propellants Explo Pyrotec

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Monopropellants based on hydroxylammonium nitrate (HAN) are a low-toxic, high-performance alternative to hydrazine in space propulsion systems. Gelling such propellants may offer additional advantages such as the longterm stability of compositions with added energetic and catalytic particles in suspension. However, the effect of gelling on the combustion characteristics and mechanisms of HAN-based propellants is not well understood. In the present work, an aqueous HAN/methanol solution (70.1 wt% HAN and 14.9 wt% methanol) was gelled with 1 wt% polyacrylamide in an acoustic mixer. Combustion of the obtained gel was studied in a strand burner at nitrogen pressures up to 30 MPa. Thermogravimetric analysis, differential scanning calorimetry, and mass spectrometry were used to investigate the reaction mechanisms in the HAN/methanol/ water solutions with and without polyacrylamide. The strand burner tests have shown that gelling suppressed the multiple pressure regimes observed in previous studies of the HAN-based propellants, with a consistent pressure exponent of 1.15 � 0.05 over the tested pressure range 4-30 MPa. Thermoanalytical testing of the gelled mixture indicates there is no chemical interaction between the gellant and the HAN decomposition, and the effect of gelling on the combustion of HAN/methanol/water propellants is hydrodynamic in nature.

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Section: Introductionmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combustion of Gelled HAN/Methanol/Water Propellants

Ferguson

Shafirovich

2021

Propellants Explo Pyrotec

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“…studied the thermal decomposition of aqueous HAN solutions by thermogravimetric analysis and mass spectrometry, and found that an increase in the rate of warming increases the temperature of HAN decomposition. In 2020, Ferguson [24] et al…”

Section: Japanese Research Institutions Have Carried Out Many Researc...mentioning

confidence: 99%