Alice Reina

Holonix srl · R&D

In this paper a hybrid framework is illustrated, with a software and hardware integration strategy, for an industrial platform that exploits features from a Relational Database (RDB) and Triplestore using the blackboard architectural pattern, ensuring efficient and accurate communication concerning data transfer among software applications and devi...

The well‐consolidated preventive maintenance strategies implemented to avoid critical failures are suitable for traditional highly repetitive mass production processes, but show some limitations in the novel production context, where more adaptive and responsive maintenance strategies are needed. Guided by this challenge, this chapter provides an a...

The reduction of the overall Life Cycle Costs (LCC) is a key issue in manufacturing sector. Among the various contributions to LCC an important part is due to Reliability and Maintainability (R&M) issues and therefore a substantial reduction in LCC can be achieved by a conscious decisions and planning. Besides the failure and repair characteristics...

The reduction of the overall Life Cycle Costs (LCC) is a key issue in manufacturing sector. Among the various contributions to LCC an important part is due to Reliability and Maintainability (R&M) issues and therefore a substantial reduction in LCC can be achieved by a conscious decisions and planning. Besides the failure and repair characteristics...

The modification of the solid propellants with nanosized aluminum has been studied. The nanosized aluminum has been found to improve burning characteristics of the propellants. The surface treatment of nanosized aluminum has been shown to affect the processabilty of formulations prepared. The physical properties including viscosity of uncured prope...

Following a comprehensive literature survey about use of Al nanopowders in a range of HEM applications — including rocket propulsion, pyrotechnics, and explosives - a through treatment is offered of the ideal and delivered thermochemical performance of the most interesting metallic ingredients to augment solid and hybrid rocket propulsion. The part...

Features such as safety, low-cost, and throttleability make hybrid rocket engines an attractive option for suborbital flights and space exploration missions in general. While the domain of possible liquid oxidizers is well characterized, the choice of a suitable solid fuel is still a matter of investigation. Space Propulsion Laboratory (SPLab) at P...

Solid rocket propellants are commonly used in space and defense applications. The simplest formulation consists of Ammonium Perchlorate (AP) as a solid oxidizer entrapped in a polymeric matrix that works also as fuel. To increase performance metallic powders are added; in particular, micrometric Aluminum is well known and widely used. But recent pr...

Nanosized powders (NP) are quite attractive for space propulsion applications, but they are difficult to handle because of the tendency to form clusters that hinder the complete exploitation of nanomaterials potential. In order to improve the dispersion degree of NP in solid rocket propellants (SP) and to decrease viscosity during manufacture, coat...

Low regression rates limit application of hybrid rocket engines (HREs). In this paper, combustion of HTPB- and solid paraffin wax-based fuels is investigated in a hybrid rocket propulsion lab-scale burner by a time-resolved optical technique. The effects of pressure are explored over the range 7 to 16 bar. Nanosized (ALEXTM , 100 nm, uncoated) and...

Several metallized solid rocket propellants, AP/Metal/HTPB in the ratio 68/18/14, were experimentally analyzed at the Space Propulsion Laboratory of Politecnico di Milano. Effects of the metals (micrometric and nanometric Al, B, Mg, and a variety of dual metals) on the performance of the propellant were studied and contrasted to a conventional micr...

only the corresponding poster presentation is provided.

Two groups of innovative metal fuels are addressed in this paper. Three nanometric powders nominally ranging from 50 to 100 nm were contrasted to three micrometric activated aluminum powders, in terms of active metal content, specific surface, SEM imaging, laser granulometry, and ignition properties in air. Both nanosized and activated aluminum pow...

only oral presentation. published without the hybrid portion by the Chinese Journal of Energetic Materials, Aug 2012.

Features such as low cost, safety, throttleability, and a wide range of appealing applications (e. g., interplanetary landers, boosters for space launcher, upper stage for Vega launcher) make hybrid rocket engines a very attractive option for aerospace propulsion. However, problems such as low regression rates of the solid fuel and low combustion e...

only the corresponding poster presentation is provided.

Features such as lowcost, safety, throttleability, and a wide range of appealing applications (e. g., interplanetary landers, boosters for space launcher, upper stage for Vega launcher) make hybrid rocket engines a very attractive option for aerospace propulsion. However, problems such as low regression rates of the solid fuel and low combustion ef...

Metal fuels are commonly used as high-energy ingredients in both solid and hybrid rocket propulsion systems. However, aggregation and agglomeration effects can sensibly modify ballistic properties and anyhow reduce the delivered specific impulse with respect to the computed ideal value. A survey of possible effects is offered, indicating widely dif...

Several heterogeneous solid rocket propellants, of the broad family AP/metal/HTPB, were experimentally analyzed at the Space Propulsion Laboratory of Politecnico di Milano in cooperation with MACH I Inc. In general, they feature the same nominal composition, but different metals are investigated as fuel powders and contrasted to a conventional micr...

Solid rocket propellants are used in both space and defense applications. The simplest formulation consists of Ammonium Perchlorate (AP) as inorganic solid oxidizer entrapped in a polymeric binder that works also as a fuel. To increase performance and stability micrometric Aluminum is added as high energy density fuel. Ballistic modifiers could be...

Iron oxide is a commonly used catalyst for solid propellants burning rate. Recently, the new frontier of nanomaterials has entered the space propulsion world, permitting to use nanosized ingredients as fuel. Later, this brand-new technology has permitted to include nanosized catalysts as well. In this work, different series of iron oxides have been...

Iron oxide is a commonly used catalyst for solid propellants burning rate. Recently the new frontier of nanomaterials has entered the space propulsion world, permitting to use nanosized ingredients as fuel. Later, however, this brand new technology has permitted to include nanosized catalysts as well: in this work different series of iron oxides ha...

Powder combustion in a CO2 atmosphere became an interesting topic as the aerospace research focused on the key technologies to be used for Mars exploration. Being Martian atmosphere rich of carbon dioxide, the use of an air-breathing system for in-situ mobility would be likely. In fact, this choice would relieve the overall weight of the system to...