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Effect of Fuel Properties on the Combustion of Storable Bipropellants : Alkanes, Ethanol with Hydrogen Peroxide

Nicolas Riaud 1, 2 Bastien Boust 1, 2 Marc Bellenoue 1, 2
2 CT - Structures de flammes et Combustion
FTC - Département Fluides, Thermique et Combustion
Abstract : Recently, the interest in storable propellants for rocket engines has been driven by the need of cost reducing of space launch: safety, easier handling, and gain in mass structure. Therefore, reduced hazards liquid propellants are considered such as hydrogen peroxide in association with green fuels (kerosene or ethyl alcohol) for propulsion. To this purpose, test benches at lab-scale have been developed at PPrime Institute (Poitiers, France): the one used in the present study is dedicated to the combustion of non-hypergolic propellants at moderate mass-flow rate (ACSEL test bench). The spray is generated by impingement of liquid jets in two configurations: either like doublet or unlike triplet. Both configurations are being studied and implemented in reactive tests with HTP875 (High Test Peroxide of 87.5% by weight) as oxidizer and, respectively, ethanol, iso-octane, and n-decane (as a pure alkane substitute of a kerosene) fuels. The injector plate is implemented in a 105 mm long combustion chamber with different nozzle throat diameters. Tests cover a range of equivalence ratio based on stoichiometry from 0.6 to 2.1 with imposed total mass flow of 15 to 20 g/s. A comparison of the combustion performances and stability is proposed in terms of chamber pressure, total mass-flow rate, equivalence ratio, and characteristic velocity. A focus is given to the effect of the fuel properties on the combustion at steady regime, considering first the effect of the miscibility of the fuel and the oxidizer, and secondly its volatility.
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Submitted on : Friday, September 13, 2019 - 11:14:37 AM
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Nicolas Riaud, Bastien Boust, Marc Bellenoue. Effect of Fuel Properties on the Combustion of Storable Bipropellants : Alkanes, Ethanol with Hydrogen Peroxide. International Journal of Energetic Materials and Chemical Propulsion, Begellhouse, 2019, 18 (2), pp.111-131. ⟨10.1615/IntJEnergeticMaterialsChemProp.2019028347⟩. ⟨hal-02285919⟩



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