Testing and Modeling Fuel Regression Rate in a Miniature Hybrid Burner

Table 5

Metal-loaded formulations: regression rate and fuel mass flow rate percent differences at discrete values of oxidizer mass flux, compared to baseline.

Regression rate percent difference (%)
	Oxidizer mass flux (kg/(m^2s))
Formulation	40	60	80	100
HTPB + 2.5% MgH2	8.25	16.47	25.39	37.19
HTPB + 7.5% MgH2	2.19	8.13	14.48	22.72
HTPB + 2.8% MgB	31.90	37.00	42.33	49.10
HTPB + 2.27% Mg + 1.4% MgB	28.63	33.53	38.67	45.19
HTPB + 2.5% MgH2 + 1.4% MgB	19.70	20.55	21.42	22.48
HTPB + 10% ALEX + 2% C	−22.57	3.58	38.87	—
HTPB + 10% ALEX + 2% TiO2	−32.49	−23.31	−12.80	1.96
HTPB + 10% L-ALEX	−11.82	−5.12	2.14	—
HTPB + 10% ALEX + 2% C + 2% Mg	−0.15	15.90	34.67	61.67
HTPB + 5% MgH2 + 5% ALEX + 1% C	−7.06	9.44	29.03	—
Fuel mass flow rate percent difference (%)
	Oxidizer mass flux (kg/(m^2s))
Formulation	40	60	80	100
HTPB + 2.5% MgH2	9.31	17.62	26.63	38.54
HTPB + 7.5% MgH2	5.09	11.21	17.73	26.21
HTPB + 2.8% MgB	34.20	39.39	44.82	51.70
HTPB + 2.27% Mg + 1.4% MgB	31.16	36.16	41.40	48.05
HTPB + 2.5% MgH2 + 1.4% MgB	21.79	22.66	23.54	24.63
HTPB + 10% ALEX + 2% C	−16.51	11.69	49.74	—
HTPB + 10% ALEX + 2% TiO2	−26.51	−16.52	−5.08	10.99
HTPB + 10% L-ALEX	−5.65	1.52	9.28	—
HTPB + 10% ALEX + 2% C + 2% Mg	9.35	26.91	47.47	77.04
HTPB + 5% MgH2 + 5% ALEX + 1% C	−1.67	15.78	36.51	—