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Performance evaluation of hypergolic green propellants based on HTP for future next-generation spacecraft

机译:基于HTP对未来的下一代航天器的高压绿色推进剂性能评估

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New, alternative candidates of hypergolic propellants to be used on the next-generation satellite platforms for the ACS systems or for the orbit transfers has been proposed. The main purpose of this study is to introduce benefits through the evaluation of ignition delay time, performance and handling requirements for new green hypergolic propellant systems based on highly concentrated hydrogen peroxide, at 98% of concentration, used as oxidizer. The novel green propellants combinations for the spacecraft mainly base on such substances as ADN and HAN, and are LMP-103S and AF-M315E, respectively. Nonetheless, highly concentrated hydrogen peroxide, H_2O_2, can also be used widely, not only in monopropellant, but also in bipropellant thrusters, especially in hypergolic systems. Highly concentrated hydrogen peroxide in contact with some organic fuel mixtures can lead to their self-initiated combustion, with reliable ignition that results in IDT on the level of several milliseconds. However, this is very dependent on the activity and amount of additives mixed with selected fuels. On the other hand, performance of such propellant compositions (liquid organic substance plus additive) can be similar to the toxic ones or even higher, in sense of density impulse. Thus, the propulsion units based on 98% hydrogen peroxide can be successfully used for many various missions of the near-future spacecraft. The utilization of highly concentrated hydrogen peroxide in the space sector can significantly decrease the total cost of satellite missions, due to its low toxicity, high power density, high stability, long duration storability and relatively cheaper safety and handling procedures.
机译:已经提出了用于ACS系统的下一代卫星平台或轨道传输的新的,替代候选者的高压推进剂候选者。本研究的主要目的是通过评估基于高浓度的过氧化氢,98%以氧化剂为基础的点火延迟时间,性能和处理要求的新绿色高温推进剂系统的效益引入益处。新颖的绿色推进剂用于航天器的组合主要是亚adn和han的这种物质,分别是LMP-103s和AF-M315E。尽管如此,高浓度的过氧化氢,H_2O_2也可以广泛使用,不仅在单普利体中,而且在双链推进器中,尤其是在高压凝固系统中。与一些有机燃料混合物接触的高度浓缩过氧化氢可导致其自引发燃烧,具有可靠的点火,导致IDT在几毫秒的水平上。然而,这非常依赖于与所选燃料混合的添加剂的活性和量。另一方面,这种推进剂组合物的性能(液体有机物质加添加剂)可以类似于密度脉冲感的毒性甚至更高。因此,基于98%过氧化氢的推进单元可以成功地用于近期航天器的许多各种任务。由于其低毒性,高功率密度,高稳定性,长期储备性和更便宜的安全性和处理程序,在空间扇区中高度浓缩的过氧化氢在空间部门中的过氧化氢的总成本显着降低了卫星任务的总成本。

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