AIAA-2015-3867 Effect of Water and Humidity on Hypergolic Propellant Ignition Delay
Table 4. Ignition probability of MMH and WFNA Oxidizer Water Concentration Relative Humidity Video Ignition Probability 0% < 24% 67% 10% < 24% 100% 0% > 95% 100% 10% > 95% 67% The photodiode shows that RH actually decreases IDT 60% (p-value = 0.03) and it has no effect on the photodiode peak voltage (p-value = 0.97). The microphone amplitude increases 150% in the high humidity environment (p-value = 0.12) but decreases when the environment is humid and water is added to the oxidizer (p- value = 0.13). These trends are shown in Figure 11. The data are inconclusive whether changing to anew WFNA bottle affected the IDT or intensity of the last 7 tests.
