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内容記述 |
In the previous paper (this report, 10, 55 (1956)) the performance of liquid propellants composed of carbon, hydrogen, and oxygen atoms was calculated. This paper discusses the performances of all sorts of liquid propellants composed of nitrogen, hydrogen, and oxygen atoms under the same conditions. The results are shown in Figures 39 and 40 for the stoichiometric mixture of fuels and oxidizers. For the cases of imperfect combustion, the results are indicated in Figures 41 to 56. The performance of any N, H, O fuel burning with the arbitrary amount of oxidizer are obtained from these charts directly, when we know the composition ri and parameter H' of that propellant. The values of specific impulse (Isp) of various kinds of fuels burning with liquid oxygen are shown in Figure 57 as a function of the amount of consumed oxidizer. From this figure we can recognize the excellent properties of hydrazine. The comparison of various kinds of oxidizer burning with hydrazine and ammonia are given in Fgures 58 and 59. From the standpoint of the value of specific impulse, liquid oxygen is determined as the best oxidizer, and the others rank with the following order : O_2 > NO > H_2O_2, N_2O_4> WFNA, RFNA> N_2O. Aa the value of product of specific impulse and mean density of propellants, i. e., density impulse (I_α), is also a good indicator to estimate the excellency of propellants, calculations of Id values are also carried out and shown in the same figures. The best oxidizer which has the highest value of density impulse is hydrogen peroxide, and the order of the others is as follows : H_2O_2 > RFNA, N_2O_4 > NO, WFNA > O_2, N_2O. In order to compare the performances of C, H, O and N, H, O propellants, Isp and J_α values of various kinds of C, H, O propellants are calculated (Figures 60, 61, 62). Following conclusions are derived for the cases of optimum mixed ratio of fuel and oxidizer: i) in the propellants burning with liquid oxygen, diacetylene shows the highest Isp value, and acetylene, hydrazine, and allene follow to this with a little lower value successively, however, the highest I_α value is obtained for hydrazine, and much lower values are obtained for the other fuels, ii) in the propellants burning with hydrogen peroxide, dihydronaphthalene, tetralin, and hydrazine have the highest I_α value. |
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