The lecture is given in four parts, each being a step in the process of nozzle design, and within each part the methods and techniques preferred by the lecturer are presented. We begin with a reminder concerning control volumes and the separation of aerodynamic and propulsive forces and moments. Then it is demonstrated how an appropriate control volume can help define the propulsive force vecto...

The present work is part of a broad effort toward predictive simulations of complex multi-physics flows at high Reynolds numbers. The main objective of the Stanford PSAAP Center (Predictive Science Academic Alliance Program) is to predict the reacting flow in the HyShot II scramjet experiment carried out in the High Enthalphy shock tunnel at Göttingen (HEG) facility of the German Aerospace Agen...

This paper reports the results of the second phase of a research project to characterize and optimize the design of an advanced launch vehicle for human access to low earth orbit. The vehicle makes use of rocket-based combined-cycle (RBCC) propulsion — a concept combining operating modes of an ejector, ramjet, scramjet, and rocket in a single engine. This research builds on previous work focuse...

A sensor for simultaneous measurements of water determinations. vapor density, temperature and velocity has been developed based on absorption techniques using room Introduction temperature diode lasers (InGaAsP) operating at 1.31 μm. Sensor calibrations of density and temperContinuous measurements of in-stream data for gas ature were acquired in a laboratory hot absorption cell dynamic and che...

For successful scramjet engine operations, it is important to understand the mechanism of inlet unstart phenomenon. Among various unstarted flow patterns in hypersonic inlets, low-amplitude oscillatory still unclear. Therefore, present study, characteristics non-oscillatory a inlet-isolator model are studied by using numerical analysis with RANS-based OpenFOAM solver. In results, amplitude pres...

In the scramjet engine, injection and mixing of fuel are basis for organizing efficient combustion. The shock wave/jet shear layer interaction is one methods used to enhance in supersonic flow. this research, effect induced wave on augmentation counter-flow jet studied crossflow. results show that symmetrical setting generators (SWGs) has highest efficiency but brings a greater total pressure l...