نحوه کار موتور های جت

موتورهای جت

یکی از انواع موتورهای درونسوز موتورهای جت هستند. در این نوع موتورها نیز همانند موتورهای پیستونی انرژی ‌ها به یکدیگر تبدیل می‌شوند. یعنی در داخل این موتورها انرژی شیمیایی به انرژی حرارتی و انرژی حرارتی به فدرت و انرژی مکانیکی تبدیل می‌شود.

بطور کلی موتور جت را می‌توان مانند یک لوله دانست که از یک طرف هوا وارد شده و با مقدار مشخصی سوحت مخلوط گشته و در نهایت پس از احتراق از لوله تنگ‌تری (اگزوز) خارج می‌شود. از آنجائیکه هوای ورودی با مقداری سوحت ترکیب شده و محترق می‌شود، دارای انرژی زیادی گشته و در هنگام خروج گازهای داغ که با شدت و سرعت زیادی همراه است، نیروی زیادی را به هواپیما وارد می‌کند. عکس‌العمل این نیرو که در جهت مخالف (به طرف جلو) و مساوی ‌آن خواهد بود، نیروی تراست نامیده می‌شود.

اختلافی که بین موتورهای پیستونی و موتورهای جت هواپیما وجود دارد اینست که در موتورهای پیستونی، ملخ مقدار خیلی زیادی هوا را با شتاب کم به طرف عقب هواپیما می‌فرستد و بدین وسیله ایجاد نیروی تراست می‌کند در حالیکه موتور جت مقدار کمی هوا را با شتاب زیاد به عقب موتور و از لوله اگزوز بیرون فرستاده و ایجاد نیروی تراست یا جلوبرنده می‌نماید.


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