تحلیل آماری بر اجکتورهای گازی تجهیزات تست ارتفاع موتورهای فضایی

نوع مقاله: علمی- ترویجی

نویسندگان

1 دانشکده‌ی مهندسی مکانیک- پردیس دانشکده‌های فنی - دانشگاه تهران- تهران - ایران

2 پژوهشگر/پژوهشگاه فضایی ایران

چکیده

در تحقیق حاضر تحلیل آماری اجکتور مورد استفاده در 50 مورد تجهیزات تست ارتفاع در دنیا صورت گرفته است. اطلاعاتی از قبیل موقعیت اجکتور، سیال عامل، تولید سیال عامل، فشار و دمای کاری، حفاظت حرارتی و هزینه‌های ساخت و عملیاتی می‌تواند در صنایع فضایی در حال توسعه مفید واقع گردد. بررسی‌ها نشان می‌دهد که در 87% از تجهیزات، موقعیت نصب اجکتور به‌صورت مرکزی بوده است. همچنین در 76% از این تجهیزات از بخار آب به‌عنوان سیال عامل استفاده شده است. جهت حفاظت حرارتی اجکتورهای مرکزی، غالبا از سیستم خنک‌کاری با اسپری آب استفاده می‌شود. با توجه به منابع موجود، نرخ جرمی آب مورد استفاده برای خنک‌کاری گازهای احتراقی قبل از اجکتور در محدوده‌ی 1/8 تا 3/9 برابر نرخ جرمی گازهای احتراقی تولید شده توسط موتور در بازه‌ی تراست 0/11 تا 204 کیلونیوتن است. در اغلب تجهیزات تست موتورهای سوخت جامد و سوخت مایع به ترتیب از انباشتگر بخار و موتور مولد بخار به‌عنوان منبع تولید بخار آب استفاده شده است.

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