In recent years, as a rule, improvement of the reliability of liquid propellant rockets becomes an international technical problem for built-up of safe space transport systems. The high performance, liquid propellant rocket engines require high-pressured turbopumps to deliver extremely low temperature propellants of liquid oxygen (LO2, boiling point 90 K) and liquid hydrogen (LH2, boiling point...

v Abstract. The chemical stability tests currently used for propellants suffer from some drawback. In this paper an attempt has been made to recast the existing system of stability testing in order to improve the reliability factor. A new stability concept has also been brought out based on the action of the stabilizer and its derivatives with the decomposed products of the nitric esters, the c...

Recent experimentation has provided a more thorough understanding of the explosive response of class 1.3 composite propellant to severe impact. This study looked at an 88% total solids HTPB/Al/AP propellant similar to what could be used in space launch boosters. The program tested propellant charges as large as 22 inches in diameter. It includes hydrodynamic modeling for developing a basic unde...

The potential environmental effects of the exhaust products of conventional rocket propellants have been assessed by various groups. Areas of concern have included stratospheric ozone, acid rain, toxicity, air quality and global warming. Some of the studies which have been performed on this subject have concluded that while the impacts of rocket use are extremely small, there are propellant dev...

Progress in the past year has occurred in the following areas: 1) understanding the role of pH and rheology on Al/water combustion, 2) encapsulation of nanoparticles in crystals for propellants, 3) disrupting ignition of aluminum with fluorocarbon inclusions, 4) the combustion of micron aluminum with hydrogen peroxide, and high speed PLIF applied to composite propellants, 5) the thermochemical ...

The present study focuses simply on propellants which are environment friendly i.e. Green propellants. In Propulsion Systems, there are two ingredients burned together which are fuel & oxidizer and the resultant energy is used to propel the system. In composite solid rocket propellants, Ammonium perchlorate (AP) is being used extensively which has its own disadvantages i.e. HCl release during i...

Hydrazine propellants pose a substantial operational concern to the U.S. Air Force and to the aerospace industry because of their toxicity. In our continuing efforts to develop methods for the prediction of the toxicological response to such materials, we have measured in vitro toxicity endpoints for a series of high-energy chemicals (HECs) that were recently proposed as propellants. The HECs c...