بررسی اثرتغییر زاویۀ واگرایی یک شیپوره متحرک بر عملکرد آن در سیستم کنترل بردار نیروی پیشران

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه سمنان ، پردیس فناوری های نوین، دانشکده مهندسی هوافضا

2 دانشگاه سمنان

چکیده

در این مقاله به‌کمک حل عددی جریان، تأثیر مقدار زاویۀ واگرایی شیپوره بر فاکتور بزرگ‌نمایی، نیروی پیش‌ران جانبی و نیروی پیش‌ران کل در یک سیستم کنترل بردار نیروی پیش‌ران با شیپورۀ متحرک (با مقطع برشی در ناحیۀ مافوق صوت) مورد بررسی قرار گرفته است. نسبت مساحت خروجی به گلوگاه و مکان مقطع برشی ثابت در نظر گرفته شده است. در حل عددی معادلات از روش حجم محدود به‌همراه حل مرتبۀ دو بالادست و روش AUSM برای گسسته‌سازی شار استفاده شده است. نتــــایج نشان می‌دهند که برای دو زاویۀ انحراف متفاوت، نتایج مدل RNG k-ε با دقت قابل قبولی با داده‌های تجربی تطابق دارند. نتایج هم‌چنین نشان می‌دهند که با افزایش زاویۀ واگرایی شیپوره، فاکتور بزرگ‌نمایی، نیروی پیش‌ران جانبی و نیروی پیش‌ران کل کاهش می‌یابند.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of Divergence Angle on Moveable Nozzle Performance in Thrust Vector Control System

نویسندگان [English]

  • Sahand Golrang 1
  • roohollah rafee 2
1 دانشگاه سمنان
2 دانشگاه سمنان
چکیده [English]

In this paper, by numerical simulation of gas flow, effects of divergence angles on the amplification factor, side force and thrust vector magnitude of a moveable nozzle with supersonic split line have been investigated. The study is conducted for constant exit to throat area ratio and the location of the split line is also constant. The finite volume method with second order upwind scheme for spatial discretization and AUSM method for flux splitting have been used in numerical solution of the equations. It was observed that for two different deviation angles, the results of RNG k-ε turbulence model are in good agreement with experimental data. Results also show that by increasing the divergence angle of the nozzle, the amplification factor, side force and thrust vector magnitude will decrease.

کلیدواژه‌ها [English]

  • Amplification factor
  • Oblique shock
  • Thrust vector control
  • Moveable nozzle
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