Angelo Pasini
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Firing Test Campaign for a Hydrogen Peroxide Propulsion System for CubeSats in Vacuum Conditions Open
This work reports the results of an on-ground experimental test campaign performed in the relevant environment (i.e., inside a vacuum chamber) of a blowdown H2O2 monopropellant propulsion system designed for CubeSat applications for the as…
Toward Greener Propulsion: An LCA-Based Environmental Performance Classification of In-Space Propulsion Options Open
As space activities expand rapidly, especially the in-orbit population, concerns about their environmental consequences are growing. For in-space propulsion, this is particularly true under the increasing regulatory pressure on hydrazine-b…
A holistic approach for efficient greener in-space propulsion Open
This paper presents a comprehensive framework for designing in-space propulsion systems, integrating four criteria: global propulsive performance, environmental impact, cost efficiency, and architectural reliability. The study focuses on t…
Performance comparison of green propulsion systems for future Orbital Transfer Vehicles Open
This paper explores the relevance of a new class of upper stages commonly referred to as Orbital Transfer Vehicles (OTVs) or Kick-Stages, and the importance of green propellants in the development of such systems. Orbital Transfer Vehicles…
Review and perspectives of “Green” Self-Pressurizing Propellants for In-Space Propulsion and their applicability to Orbital Stages Open
Green Propulsion is an increasingly prevalent trend in the space industry that has experienced significant growth in recent decades. The shared objective of researchers is to identify suitable alternatives to existing liquid propellants fo…
ANALYTICAL HIERARCHY PROCESS-BASED TRADE-OFF ANALYSIS OF GREEN AND HYBRID PROPULSION TECHNOLOGIES FOR UPPER STAGE APPLICATIONS Open
As an emerging trend, green propulsion has been exponentially growing over decades in the space sector. This paper assesses different technologies in a trade-off study weighing their applicability to a specific class of upper stage systems…
Simulation of Deployable Cable Nets for Active Debris Removal in Space Open
Deployable cable nets have been proposed as promising systems for the active removal of space debris. The modelling and analysis of such systems during deployment, capture, and post-capture phases are crucial for the effective design of an…
MODELLING OF DEPLOYABLE CABLE NETS FOR ACTIVE SPACE DEBRIS REMOVAL Open
Space debris represent a true risk for current and future activities in the circumterrestrial space, and remediation activities must be set out to guarantee the access to space in the future. For active debris removal, the development of a…
Challenges and Opportunities of Green Propellants and Electric Pump Feeding for Future European Kick Stages Open
This paper analyses the synergy between two innovative technologies: green propellants and electric pump feeding, for a 500 N engine thrust range. The novel approach is then compared to the legacy configuration, i.e., an MMH/NTO pressure f…
Modular Impulsive Green Monopropellant Propulsion System (MIMPS-G): For CubeSats in LEO and to the Moon Open
Green propellants are currently considered as enabling technology that is revolutionizing the development of high-performance space propulsion, especially for small-sized spacecraft. Modern space missions, either in LEO or interplanetary, …
Turbopump Design: Comparison of Numerical Simulations to an Already Validated Reduced-Order Model Open
The article expands on the ongoing assessment of the reduced order model proposed by some of the authors for the geometric definition and noncavitating performance evaluation in the preliminary design and parametric optimization of mixed-f…
Influence of Fluid-Induced Forces on Cavitating Turbopumps Rotordynamics in Forced Whirl Experiment Open
As typically highlighted in the experimental results, in unshrouded axial inducers the fluid-induced rotordynamic forces are significantly dependent on the flow coefficient and do not present a quadratic behavior with respect to the whirl …
Maximum Likelihood Identification of Cavitation Instabilities in Axial Inducers Open
The article illustrates the application of maximum likelihood estimation to the identification of cavitation instabilities in axial inducers from the unsteady pressure readings measured on the impeller casing. The typical triangular pressu…
Review of State-of-the-Art Green Monopropellants: For Propulsion Systems Analysts and Designers Open
Current research trends have advanced the use of “green propellants” on a wide scale for spacecraft in various space missions; mainly for environmental sustainability and safety concerns. Small satellites, particularly micro and nanosatell…
Conceptual Study of Technologies Enabling Novel Green Expendable Upper Stages with Multi-Payload/Multi-Orbit Injection Capability Open
The growing demand for cheaper space access calls for a more economically and environmentally sustainable approach for launchers. Concurrently, the shift to smaller satellites and the rise of constellations necessitate launchers capable of…
Modular impulsive green-monopropellant propulsion system for micro/nano satellites high-thrust orbital maneuvers (MIMPS-G) Open
Innovation in small-satellite modern space missions and applications require propulsion capabilities to enable active operations in orbit, such as formation flying, rendezvous operations, orbital altitude & inclination changes, and orbital…
Dynamics of the Blade Channel of an Inducer Under Cavitation-Induced Instabilities Open
A high-head three-bladed inducer has been equipped with pressure taps on the hub along the blade channels with the aim of more closely investigating the dynamics of cavitation-induced instabilities developing in the impeller flow. Spectral…
Analysis of Flow Instabilities on a Three-Bladed Axial Inducer in Fixed and Rotating Frames Open
The paper describes the results of recent experiments carried out in the Cavitating Pump Rotordynamic Test Facility for the dynamic characterization of cavitation-induced flow instabilities as simultaneously observed in the stationary and …
Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump Open
The paper presents an experimental campaign aimed at the characterization of the relationship between cavitation-induced instabilities and forces acting on the shaft, relevant to space application turbopumps. The experiments have been carr…
Inducer and Centrifugal Pump Contributions to the Rotordynamic Fluid Forces Acting on a Space Turbopump Open
The fluid induced rotordynamic forces acting on a whirling space turbopump composed by an inducer and a radial impeller have been compared to the same forces measured on each single component of the turbomachine (i.e. on the inducer and on…
Fluid-Induced Rotordynamic Forces on a Whirling Centrifugal Pump Open
The experimental characterization of the rotordynamic fluid forces acting on a whirling centrifugal impeller have been investigated at different flow rates and cavitating conditions. The recently developed method for continuously measuring…