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首页> 外文期刊>Journal of Mechanical Science and Technology >Investigations into the copper chromite particle size effect on the combustion characteristics of poly(vinyl-chloride) plastisol propellants
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Investigations into the copper chromite particle size effect on the combustion characteristics of poly(vinyl-chloride) plastisol propellants

机译：对聚（氯化乙烯酰氯）塑性溶胶推进剂的燃烧特性的研究进入铬铬颗粒尺寸

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The investigation of the possibility to optimize ballistic behavior and consequently to obtain better performance without affecting the cost and safety aspect of plastisol propellants has been presented in this paper. Addition of specific additives and changes in particle size can be one of these solutions, which are continuously in research. The use of burn rate modifier and metallic fuel, with finer particle sizes, becomes mandatory, to enhance the catalytic effect on ammonium perchlorate and to offer additional high heat release. Moreover, the knowledge of the combustion characteristics and especially the burning rate depending on the combustion chamber pressure of the propellant are important conditions in the validation and successful design of a solid rocket motor. The first part of this work deals with the selection of the higher energetic catalyst among three of the most common of them, namely copper chromite, ferric oxide and ferrocene. The selection results in choosing copper chromite as the best burning catalyst. Then, we have studied the effect of its particle size on the thermoanalytical properties of poly(vinyl-chloride) plasticized propellants, by the determination of energetic and kinetic characteristics through the use of an adiabatic bomb calorimeter and a differential scanning calorimeter respectively. The kinetic parameters were determined by Ozawa and Kissinger methods and compared. Besides, the effect of particle size on the combustion properties has been also studied. The plot of the burning rate-pressure curves is used to determine the combustion laws using a strand burner in the typical Crawford bomb. Copper chromite and its particle size have been found to influence the decomposition and to enhance the burning rate of the plastisol propellants. In the second part, we have investigated the energetic effect of fine aluminum powder on the thermal decomposition of ammonium perchlorate and of plastisol propellant as a function of its concentration, both in the presence and the absence of 1 mass-% copper chromite in the basic propellant composition. Aluminum is chosen because of its effect to get high flame temperatures and increased performance.
机译：本文提出了对不影响塑性溶解剂推进剂的成本和安全方面的不影响塑性溶胶推进剂的成本和安全方面来获得更好的性能的可能性。添加特异性添加剂和粒度的变化可以是这些溶液中的一种，这些解决方案是在研究中连续的。使用燃烧速率改性剂和金属燃料，具有更精细的粒度，成为强制性的，以增强高氯酸铵的催化作用，并提供额外的高热释放。此外，根据推进剂的燃烧室压力的燃烧特性和尤其是燃烧速率的认识是固体火箭电动机的验证和成功设计中的重要条件。这项工作的第一部分涉及较高的能量催化剂，其中三种最常见的催化剂，即铬铁矿，氧化铁和二茂铁。选择为最佳燃烧催化剂选择铜铬铁矿。然后，我们研究了粒度对聚（氯化乙烯酰氯）塑化推进剂的热分析性质的影响，通过使用绝热炸弹量热计和差分扫描量热计来确定能量和动力学特性。动力学参数由Ozawa和Kissinger方法确定并进行比较。此外，还研究了粒度对燃烧性能的影响。燃烧率压力曲线的曲线曲线用于在典型的克劳福德炸弹中使用股线燃烧器来确定燃烧规律。已经发现铜铬铁矿及其粒度影响分解并增强塑性溶胶推进剂的燃烧率。在第二部分中，我们研究了精细铝粉对高氯酸铵和塑性溶胶推进剂的热分解的能量作用，因为其浓度在存在和不存在1质量％铜铬铁矿中推进剂组合物。选择铝，因为它的效果可以获得高火焰温度和增加的性能。

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