نتایج جستجو برای: rocket engine
تعداد نتایج: 75532 فیلتر نتایج به سال:
Sixty percent of the failures launch vehicles in ascending phase occur propulsion system. Among them, vibration generated by engine is an important factor occurrence failure. At present, health assessment methods aerospace field are mostly for specific equipment, and scholars assess real-time status vehicle engines which can only reflect current vehicle. Existing cannot be applied to different ...
The effect of manufacturing quality on rocket impact point dispersion is analyzed. approach presented here applies to any type rocket. Here, demonstrated for the unguided rocket, and by simulating four typical errors: erroneously manufactured warhead, misalignment between warhead engine chamber, asymmetrically installed propellant, error in nozzle manufacturing. A new methodology proposed, whic...
در این پایان نامه پروفیل سه بعدی پره پمپ های سیستم تغذیه موشک که از نوع پمپهای گریز از مرکز با دور بالا می باشند طراحی شده است برای طراحی پروفیل پره، روش های دو بعدی (یک فوس دایره، دوقوس دایره و نقطه به نقطه) و سه بعدی (نقطه به نقطه و مثلثهای خطا) بررسی و با فرض معلوم بودن ابعاد هندسی چرخ (شعاع، وزاویه پره در ورود و خروج) طراحی انجام شده و در انتها نتایج تحلیلی ارائه گردیده است. همچنین پدیده لغ...
The feasibility of rebuilding and testing a nuclear thermal rocket (NTR) for the Mars mission has been investigated. Calculations indicate that an NTR would substantially reduce the earth-orbit assembled mass compared to L02/LH2 systems. The mass savings were 36% and 65% for the cases of total aerobraking and of total propulsive braking respectively. Consequently, the cost savings for a single ...
The DLR LUMEN (Liquid Upper stage deMonstrator ENgine) rocket engine comprises of two separate turbopumps, one each for Liquid Oxygen (LOX) and Liquified Natural Gas (LNG) supply. In both an identical bearing block separates the pump section from turbine section. current design, features oil-jet lubrication system to cool lubricate bearings during operation. Cryogenic conditions at pump-interfa...
Owing to the prime importance of ammonium dinitramide (ADN) as an oxidizer in solid propellants, its synthesis has received a great amount of interest. There have been several new and innovative synthesis routes developed by researcher’s worldwide. Liquid-fuel rockets consist of a fuel and oxygen (or other oxidizer) in liquid state. These fractals are already being combined together or combined...
Coupling of physics in large-scale complex engineering systems must be correctly accounted for during the systems engineering process to ensure no unanticipated behaviors or unintended consequences arise in the system during operation. Structural vibration of large segmented solid rocket motors, known as thrust oscillation, is a well-documented problem that can affect the health and safety of a...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید