Aerodynamic Characteristics of Re-Entry Capsules with Hyperbolic Contours

For most re-entry capsules, the shape of the forebody of the capsule is designed based on the blunted nose cone. A similar shape can be created using a hyperboloid of revolution that can control the nose bluntness and the half angle of the cone easily. In this study, the hypersonic aerodynamic characteristics of re-entry capsules designed with hyperbolic contours were investigated using the CFD code, FaSTAR, developed by Japan Aerospace Exploration Agency (JAXA). The CFD results showed that, using the hyperbolic contours, the drag and lift coefficients can be increased compared to those for the Hayabusa re-entry capsule without changing the shape of the capsule drastically. This suggests that shape design based on the hyperbolic contours can improve the aerodynamic characteristics of re-entry capsules.

Ventilation via nose cone results in similar hemodynamic parameters and blood gas levels as endotracheal intubation during open chest surgery in rats

Open chest surgery in rodents requires assisted breathing and the most common approach for ventilation is via an endotracheal tube. Even with well-trained operators the endotracheal intubation is technically challenging and may lead to prolonged procedures and endotracheal intubation complications. Nose cone ventilation is a simpler procedure compared to endotracheal intubation and has the potential to improve animal welfare by reducing procedure time and endotracheal intubation associated complications. Rats are obligate nose breathers, and therefore replacing intubation with air supply from a nose cone would be an advantage and a more natural way of breathing. Here, we compared the values for several blood gases, blood pressure and heart rate from rats that were nose cone ventilated with rats that underwent endotracheal intubation at 12 timepoints equally distributed across three surgical stages: baseline, open chest and closed chest. Throughout the monitoring period the hemodynamic and blood gas values for both methods of ventilation were within published, normal ranges for the rat and were biologically equivalent (equivalence test p value ≤ 0.05). Our data showed that nose cone ventilation-maintained blood gases and hemodynamic homeostasis equivalent to endotracheal intubation. Nose cone ventilation can be recommended as an alternative to endotracheal intubation in rat experiments where investigators require airway control.

Aerodynamic Optimization of the Von Karman Nose Cone for a Supersonic Sounding Rocket

Nose cone design is very much reliant on the conditions of the rocket’s flight path. The design is dependant on the altitude, velocity profile, materials, and other factors. This report will look at optimizing a rocket nose cone design based on preliminary measurements, aerodynamic factors, and engineering design process. This analysis will be done utilizing ANSYS Fluent to conduct CFD on 2D symmetric Von Karman nose cones of varying fineness ratios.

Aerodynamic Optimization of the Von Karman Nose Cone for a Supersonic Sounding Rocket

Nose cone design is very much reliant on the conditions of the rocket’s flight path. The design is dependant on the altitude, velocity profile, materials, and other factors. This report will look at optimizing a rocket nose cone design based on preliminary measurements, aerodynamic factors, and engineering design process. This analysis will be done utilizing ANSYS Fluent to conduct CFD on 2D symmetric Von Karman nose cones of varying fineness ratios.

Design, Analysis and Simulation of a Single Stage Rocket (Launch Vehicle) Using RockSim

This project describes the design, analysis, assembly and simulation of a single stage model rocket systems, one designed with traditional subsystems for structural, avionics, combustion chamber and recovery integrated to give a desired altitude. The analysis was based on using Rocksim 9.6 to model the different parts that made up a rocket. Aluminium was used for designing the nose cone, the fuselage and the fin set. The combustion chamber, clamps, and nozzle were designed by making use of steel. Because of the high temperature and pressure being generated from the combustion of propellant, steel was suggested. The main and drogue parachutes were designed using tubular Kevlar. And the bulk-head was designed using Basswood. For the recovering of the rocket after launch, main and drogue parachutes were incorporated into the fuselages.

COMPOSITE USE IN NOSE CONE DESIGNING FOR AIRCRAFTS

The purpose of the work presented in the paper consists in the choice of radio-transparent material that can withstand loads influencing a nose cone of an aircraft during a flight. In the paper there is solved a problem which consists in comparing the characteristics of different materials used in aircraft industry both common materials and composites and in the choice of the most efficient field of materials that meet the requirements of radio-transparency, strength and heat-resistance. The investigation work is carried out by means of the collection, processing and analysis of data obtained through an experimental way and containing information on strength characteristics, radio-transparency characteristics, on the range of operation temperatures, density and rigidity of each kind of material analyzed. On the basis of the investigation results a field of application of the materials under consideration is offered: in accordance with physical characteristics of composites analyzed the most efficient solution will be the application of glass-ceramic composites for manufacturing radio-transparent nose cones exposed to strong temperature changes during short periods of time caused by super-sonic speed achieved during flights and glass-ceramics, but glass-plastic having lower density and heat-resistance – for manufacturing nose cones of sub-sonic planes which are not subjected to such high thermal loads, at that it was defined that aircraft steels and composites based on metal matrix are not suitable for manufacturing nose cones in view of their high density and low radio-transparency.