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首页> 外文期刊>Aerospace science and technology >Restitution methodology for space and time dependent solid-fuel port diameter evolution in hybrid rocket engines
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Restitution methodology for space and time dependent solid-fuel port diameter evolution in hybrid rocket engines

机译：混合火箭发动机的空间和时间依赖性固体燃料港口直径演变的恢复方法

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摘要

A post-processing tool for experimental data is developed to rebuild the instantaneous and local distributions of the fuel port diameter and the fuel regression rate throughout the port conduct during a firing test. The main objective is to use the developed methodology to be able, at a given instant during the firing test, to simulate a hybrid rocket engine configuration and to validate the related numerical modeling. The methodology is based on the coupling between the instantaneous fuel mass flow rate obtained by a ballistic reconstruction technique and the port diameter measurement throughout the port conduct after the firing test. The ballistic reconstruction method is adapted and applied to an experimental hybrid rocket, using hydrogen peroxide/high density polyethlylene propellants, with a catalytic injector (HYCAT). Firstly, a set of representative firing tests is selected from the HYCAT hybrid rocket engine testing campaign. Secondly, an analytical approach leads to instantaneous evolutions of the fuel port diameter and the fuel regression rate profiles throughout the fuel port conduct. The rebuilt profiles of the instantaneous port diameter show the ability of the methodology to restore the space and time distribution of the fuel port diameter. Nevertheless, the fuel regression rate distributions show some limitations of the methodology even though the average is coherent with the ballistic reconstruction trends. (C) 2021 Elsevier Masson SAS. All rights reserved.
机译：开发了用于实验数据的后处理工具以在射击测试期间重建燃料端口直径的瞬时和局部分布和整个端口行为中的燃料回归速率。主要目的是使用发达的方法能够在射击测试期间的给定瞬间能够模拟混合火箭发动机配置并验证相关的数字建模。该方法基于通过弹道重建技术获得的瞬时燃料质量流量与在射击测试之后整个端口传导中获得的瞬时燃料质量流量之间的耦合。使用催化注射器（Hycat），使用过氧化氢/高密度聚甲烯推进剂进行调整并施加到实验混合火箭上。首先，从Hycat混合火箭火箭发动机测试活动中选择一组代表性的射击测试。其次，分析方法导致燃料端口直径的瞬时演进和整个燃料端口行为中的燃料回归速率分布。瞬时端口直径的重建配置文件显示了方法恢复燃料端口直径的空间和时间分布的能力。然而，燃料回归率分布显示了方法的一些限制，即使平均与弹道重建趋势相干。 （c）2021 Elsevier Masson SAS。版权所有。

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