In this paper, we tackle the issue of the accurate simulation of evaporating and reactive polydisperse sprays strongly coupled to unsteady gaseous flows. In solid propulsion, aluminum particles are included in the propellant to improve the global performances but the distributed combustion of these droplets in the chamber is suspected to be a driving mechanism of hydrodynamic and acoustic insta...

A theory of the Hindenburg fire that has recently gained popular acceptance proposes that the paint on the outer surface of the airship caused both the fire and its rapid spread. However, application of physical laws and numerical calculations demonstrate that the theory contains egregious errors. Specifically: (1) The proposed ignition source (an electrical spark) does not have sufficient ener...

cerns in rocket motor design because of the enormous cost of typical payloads and, in the case of the Space Shuttle and other manned vehicles, for the crew’s safety. In the spring of 1999, for example, a series of three consecutive launch failures collectively cost more than US$3.5 billion. The most notorious launch failure, of course, was the tragic loss of the Space Shuttle Challenger and its...

Rocket fairings, load-carrying structures of solid rocket motor case, e.g., inter-stage joint, satellite-rocket joint, etc., usually take the shape of conical shell sections. This paper is to evaluate spatially distributed microscopic control characteristics of distributed actuator patches bonded on conical shell surfaces. The converse effect of piezoelectric materials has been recognized as on...

As the nondestructive testing method based on industrial computerized tomography (ICT) is widely used in solid rocket motor (SRM) propellant defect detection, demand for a corresponding image processing algorithm increasing. In order to extract better information SRM propellants, we studied edge detection their ICT images. This paper proposes guided filter-based images of propellants with much ...

In order to achieve the thermal structural integrity analysis of solid rocket motor nozzle accurately and efficiently, multifield (flow-thermal-mechanical) coupled numerical investigation was carried out based on mesh-based parallel code interface. The simulation process finite element model algorithm engineering were obtained, while physical simplified appropriately. interface parameters, inte...