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題名 | 細粒徑過氯酸銨對推進劑藥柱駝峰效應之影響=Influence of VFAP on the Hump Effect of Solid Propellant Grains |
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作者姓名(中文) | 張明福; 傅銘田; 邢禹成; |
作者姓名(外文) | Chang, Ming-fu; Fu, Ming-tien; Hsing, Yue-cheng; |
書刊名 | 新新科技年刊 |
卷期 | 11 2015.01[民104.01] |
頁次 | 頁127-132 |
分類號 | 595.81 |
語文 | chi |
關鍵詞 | 駝峰效應; 固體推進劑藥柱; 細粒徑過氯酸銨; Hump effect; Solid propellant grains; Very fine ammonium perchlorate; |
中文摘要 | 本文藉縮尺寸發動機與中空圓管藥柱,測試固體推進劑中之細粒徑過氯酸銨 (Very Fine Ammonium Perchlorate, VFAP)在不同燃燒室壓力下對駝峰效應(Hump Effect)趨勢的影 響。其中VFAP含量佔整體推進劑的重量分率為36%至38%。結果顯示:本研究使用的藥柱燃燒時,出現雙駝峰的特徵,駝峰分別位於0.4及0.6無因次化作用時間的位置,且駝峰升高的比例隨燃燒室壓力增加而降低。當VFAP含量增加時,兩駝峰逐漸靠近,最大峰值漸減,且隨燃燒室壓力而變化的趨勢限縮。此趨勢表明,較高VFAP含量配方的推進劑,較易掌握其駝峰現象,不過它會造成鑄藥的困擾,並不適用為實際配方。雙駝峰現象表明,以往用藥漿流變(Rheology)或熱傳來解釋駝峰效應的模式,需再深入探討謀求精進。 |
英文摘要 | Sub-scaled motor with neutral burning perforated grains have been fired to study the wellknown hump effect of solid rockets. It has eighty-five percents solid contents in such a HTPB propellant grain. And, it holds very fine ammonium perchlorate (VFAP) with the mass fraction ranging from 36 percents to 38 percents. The motors are fired under the chamber pressure around 90 to 115 atm. The internal ballistic curves show an uncommon shape of two-humps. The two humps appear at 0.4 and 0.6 of the normalized action time. Its peak pressure will decrease when the operating pressure rises up. We also observe that humps may get closer and closer if the VFAP loading is greater. In the same time, the peak as well as its variation with operating pressure gets small. This trend reveals that the higher VFAP content could suppress the hump effect. We, however, do not suggest this formula due mainly to it causes the casting problem. The two-hump effect tells researcher a fact that the models of rheology and heat transfer those usually used in explaining the hump effect need to be modified for solving this problem. |
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