An understanding of the scalability hybrid rocket regression models is critical for enlargement and commercialization small-scale engines developed within universities similar research institutions. This paper investigates fuel rates recent 40 kN thrust-class motor experiments, which were designed based on rate correlations 2.5 motors from previous research. The results show that experiments 26...

Abstract The objective of this work is to describe and validate a numerical axisymmetric approach for the simulation hybrid rocket engines (HREs), based on Reynolds-averaged Navier–Stokes simulations, with sub-models fluid–surface interaction, radiation, chemistry, turbulence. Fuel grain consumption considered both radial axial directions swirl injection oxidizer are simulated. Firing tests two...

Yellow rocket, Barbarea vulgaris (R. Br.) variety arcuata, was evaluated as a trap crop for diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), in cabbage, Brassica oleracea L. variety capitata, in 2003 and 2004. In 2003, the numbers of P. xylostella larvae found in field plots of cabbage alone were 5.2-11.3 times higher than those on cabbage plants in plots that included cab...

This article gives an in-depth analysis of the experimental data of the TK-1G sounding rocket installed with the satellite navigation system. It turns out that the data acquisition rate of the rocket sonde is high, making the collection of complete trajectory and meteorological data possible. By comparing the rocket sonde measurements with those obtained by virtue of other methods, we find that...

A model of a linear aerospike rocket nozzle that consists of coupled aerodynamic and structural analyses has been developed. A nonlinear computational fluid dynamics code is used to calculate the aerodynamic thrust, and a three-dimensional finite-element model is used to determine the structural response and weight. The model will be used to demonstrate multidisciplinary design optimization (MD...

Hybrid propellants are of great interest in space propulsion for combining desirable characteristics of solid and liquid propulsion technologies: simplicity and operational readiness (from solid) with variable thrust and high performance (from liquid), minimizing the disadvantages associated with each one. However, a hybrid propulsion was always limited to the low rate of burning of its solid f...

At subcritical pressures, atomization devices in chemical-propulsion systems must ensure proper rupture of the liquid volume through aerodynamic shearing and homogeneous dispersion of the liquid droplets in the combustion chamber. The gas environment in the combustor is typically hot as a result of the heat released by chemical reactions, with part of its enthalpy being employed in vaporizing t...

crops that better tolerate weed competition or preempt resources from weeds may reduce dependence on herbicides and benefit an integrated weed management program. a field trail was conducted to determine the morphophysiological characteristics affecting tolerance and weed suppressive ability of some winter wheat cultivars in competition with rocket. the experimental treatments consisted of eigh...

Rocket plume temperature distribution plays an important role on the heat transfer analysis of launch carriers. Thus, a non-intrusive IR scanner is used in this paper to analyze the influence of spin motion on plume centerline temperature measurements of spinning solid-propellant rockets. Results show that the average error of temperature measurement is below 3.5% even with a 10% error of estim...