A time-resolved numerical analysis of combustion dynamics of double-base homogenous solid propellant in a rocket motor is performed by means of a Large-Eddy Simulation (LES) technique. The physiochemical processes occurring in the flame zone and their influence on the unsteady flow evolution in the chamber are investigated in depth. A five-step reduced reaction mechanism is used to obtain the t...

Turbulent flow separation coupling heat transfer with the solid case in the high area ratio rocket nozzle is simulated with the CFD method and the results are investigated experimentally. The finite volume method, the 2nd order upwind scheme, SST k-ω turbulence model and enhanced wall function are employed to solve the N-S equation and thermal conduction equation. To predict the fluid field and...

With the advance in wireless networking, IEEE 802.16 WiMAX technology has been widely deployed for several applications such as “last mile” broadband service, cellular backhaul, and high-speed enterprise connectivity. As a result, military employed WiMAX as a high-speed wireless connection for data-link because of its point to multi-point and non-line-of-sight (NLOS) capability for many years. ...

Este artículo presenta el diseño, construcción y prueba estática de un prototipo motor cohete propulsado por combustible sólido tipo Candy. El diseño se basó en la metodología SRM (Solid Rocket Motor Design). incluyó sistema ignitor, cámara combustión, tobera. diámetro interno combustión longitud total del fueron 27,67 mm 230 mm, respectivamente. La tobera fue Laval convergente-divergente. mezc...

In inspecting steel-rubber multi-layered structure, shielding of steel layer and intense attenuation of rubber layer result in ultrasonic echo from the interfaces of the deep layers being very weak. In order to overcome the difficulty, the double mode testing method is put forward. This method synthesizes the characteristics of transverse wave and Lamb wave testing. In the double modetesting tr...

Solid rocket motors (SRMs) are widely used as propulsion devices in the aerospace industry. The SRM nozzle and combustion chamber connected with a plugged-in structure, which makes it difficult to use existing technology investigate internal conditions of during docking assembly. unknown deformation O-ring inside groove caused by different assembly will prevent engine quality from being accurat...

Abstract This work follow a previous activity that developed non-intrusive measurements technique for particles velocity ejected from solid rocket motor based on wavelet analysis. The aim was to detect the passage and calculate axial through an auto-conditioned cross-correlation algorithm. In this study, processing techniques are applied innovative methodology cross-wavelet analysis is presente...

Enhancement of Volumetric Specific Impulse in HTPB/Ammonium Nitrate Mixed Hybrid Rocket Systems by Jacob W. Forsyth, Master of Science Utah State University, 2016 Major Professor: Dr. Stephen A. Whitmore Department: Mechanical and Aerospace Engineering Hybrid rocket systems are safer and have higher specific impulse than solid rockets. However, due to large oxidizer tanks and low regression rat...