BrainMap

Costin Ioan Coșoiu

Dr.

Associate Professor - UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI

Researcher | Teaching staff | Scientific reviewer

Web of Science ResearcherID: P-3478-2014

Expertise & keywords

Innovative seating system to reduce SARS-CoV-2 transmission on board of commercial aircrafts Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2021-2265 2022 - 2024

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI

Project partners: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE AEROSPATIALA "ELIE CARAFOLI" - I.N.C.A.S. BUCURESTI (RO); UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Affiliation:

Project website: http://www.cambi.ro/safe

Abstract:

Întreaga omenire a fost perturbată de extinderea pandemiei de COVID 19 de la o țară la altă utilizând căile de comunicație ale lumii moderne. In timp ce statisticile indică aproximativ 220 milioane persoane infectate pe glob, IATA a înregistrat o scădere a veniturilor anuale globale din transportul de pasageri de aproximativ 126 miliarde euro precum și alte pierderi indirecte legate de aspectele economice și sociale grav afectate de virus.

Proiectul SAFE își propune o abordare cuprinzătoare în acest sens pentru a putea răspunde noilor cerințe în ceea ce privește asigurarea un microclimat îmbunătățit al pasagerilor la bordul aeronavelor comerciale în scopul reducerii semnificative a transmiterii aeriene a virușilor de tip SARS sau similari. Pentru a atinge acest obiectiv, ne propunem să investigăm o combinație de strategii diferite de ventilație personalizată de protecție (PPV) utilizând mijloace de protecție precum ecrane, hote sau cabine. Conceptul SAFE folosește avantajele dispozitivelor clasice de ventilare personală care asigură o curgere cu impuls redus pentru a crea în jurul capului pasagerului un curent de aer protector. Vom explora comportamentul și interacțiunea fluxurilor menționate mai sus cu panașul termic al corpului uman. De asemenea vom testa aceste fenomene și atunci când jetul provenit de la al doilea difuzor este umidificat și vom analiza efectul combinat obținut prin cuplarea sistemului de ventilare personalizată.

Innovative high induction air diffusers for improved indoor environmental quality in vehicles Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2021-0559 2022 - 2024

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI

Project partners: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO); RENAULT TECHNOLOGIE ROUMANIE SRL (RO)

Affiliation:

Project website: http://cambi.utcb.ro/researchprojects/innovent

Abstract:

The scope of current project will be to develop an innovative passive high mixing system of air diffusers implemented in a disassembled Dacia Duster or Sandero dashboard in order to proof its functionality both in terms of improved comfort and reducing the ventilation airflow. The project is starting from concept (TRL2) and the result will be a prototype working in laboratory environment (TRL4). The proposal of the innovative designs of air vents for the present studies was based on the previous findings of the members of the TUCEB research team that have a long interest in this field. The general objective of the current project will be to implement an innovative system of high induction mixing air diffusers in a functional Dacia Duster or Dacia Sandero prototype dashboard model. The specific objectives of the current project are: 1. Developing a high induction air diffuser system ready to be integrated in a Dacia Duster or Dacia Sandero; 2. Performing nonintrusive experimental measurements of the airflow after the high induction air diffuser 3. Verification and validation of the numerical simulations for the high induction air diffuser; 4. Complex numerical models of the airflow inside a vehicle for different configurations of high induction air diffusers; 5. Validation of the innovative air diffuser prototype system using a thermal manikin, ComfortSense equipment and with human subjects.

ADVANCED AIR DIFFUSION SYSTEM OF THE CREW QUARTERS FOR THE ISS AND DEEP SPACE HABITATION SYSTEMS Call name:
STAR-CDI-C3-2016-577 -

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI

Project partners:

Affiliation:

Project website:

Abstract:

Small Ducted Wind Turbine Equipped with Passive Flow Control Devices Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-0631 2017 - 2018

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI

Project partners: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO)

Affiliation: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO)

Project website: http://swan34.utcb.ro

Abstract:

The main objective of the project is to reach a Technology Readiness Level (TRL) equal to TRL4, starting from a TRL level equal to TRL3, for a new energy production technology using small ducted wind turbines equipped with passive flow control devices. The scope of the technology is to harvest energy from wind in sites where aeolian potential is low or in urban environment using ducted wind turbines. Previous preliminary theoretical and numerical results on the flow around ducted wind turbines equipped with passive flow control devices performed by researchers involved in this project proposal, are relevant to industrial needs. These results emphasize that this technology is representing one of the solution to three main problems, resulted by analyzing the national and international state of the art, which appeared in wind energy production domain in the context of an accelerated dynamics in this area in the first decades of the 21st Century. The concept will be validated in laboratory environment using an experimental model of the small ducted wind turbine equipped with passive flow control devices. The experimental model will be tested in controlled and reproducible conditions, simulated at the TASL1-M Boundary Layer Wind Tunnel from “Constantin Iamandi” Aerodynamics and Wind Engineering Laboratory from Technical University of Civil Engineering of Bucharest, the largest research infrastructure for wind engineering research in South-Eastern Europe and one of the most important in Europe. The project involves a broader set of activities involving fundamental and experimental research that will be carried out in order to build and set up the laboratory demonstrator, which will be used to perform two types of experimental tests that will prove the concept and will quantify its performances in respect with the present technology development.

ANTIFLUTTER DEMONSTRATOR WITH PIEZOELECTRIC ACTUATION Call name: Joint Applied Research Projects - PCCA 2013 - call
PN-II-PT-PCCA-2013-4-2006 2014 - 2017

Role in this project:

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE AEROSPATIALA "ELIE CARAFOLI" - I.N.C.A.S. BUCURESTI

Project partners: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE AEROSPATIALA "ELIE CARAFOLI" - I.N.C.A.S. BUCURESTI (RO); UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE TURBOMOTOARE - COMOTI (RO); STRAERO-(INSTITUTUL PENTRU CALCULUL SI EXPERIMENTAREA STRUCTURILOR AERO-ASTRONAUTICE) S.A. (RO); UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO); INAV S.A. (RO); ENERGOREPARATII SERV SA (RO)

Affiliation: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO)

Project website: http://www.incas.ro/index.php?option=com_content&view=article&id=384&Itemid=69

Abstract:

This project will develop an advanced system for active flutter and vibration control and gust alleviation for critical aerospace applications. Flutter is a critical phenomenon of unstable structural vibration occurring without warning when a critical flight speed is exceeded and may lead to flight accidents and loss of lives. Gust is a dynamic aeroelastic phenomenon resulting in excessive fatigue and vibration that shortens the aircraft life and may lead to unpredicted failures. Our proposed Antiflutter Demonstrator with Piezoelectric Actuation (AFDPA) system will prevent these critical phenomena by applying advanced control laws and algorithms based on the Maximal Lyapunov Exponent (MLE) methodology. The implementation of this active flutter and vibration control approach will be done through the use of high-bandwidth piezoelectric actuation embedded into a “smart wing” design that will be able to respond with great speed and precision to the MLE controller and thus prevent in flight accidents. The AFDPA team (INCAS, ROMAERO, UPB, COMOTI, STRAERO, UTCB, INAV) is uniquely positioned to perform this research because INCAS technical staff, in collaboration with experts from the other team members, has unmatched expertise and there is no other team in Romania and even South Eastern Europe that could perform this challenging project.

The idea of flutter vibration active control and gust alleviation is not historically new but the technological enablers for implementation have only recently become available through induced-strain actuated smart structures using piezoelectric active materials. The literature reports several concepts of smart-materials active vibration control of helicopter rotor blades, some of them even built and flight tested. However, there are almost no similar results for fixed wing aircraft; this is due to the more difficult challenges posed by the fixed-wing smart-structures aeroelastic applications, i.e., greater torsional wing stiffness, larger aerodynamic forces, and greater required deflections, difficult to overcome with conventional piezoelectric actuators. In this project, we are going to address this challenge by applying the theory of maximum energy extraction from induced-strain actuation in the presence of stroke amplification and kinematic linear-to-rotary conversion. We will aim at achieving efficient stroke conversion from linear to rotary with optimum energy transduction and maximum efficiency through an innovative kinematic analysis and design coupled with advanced modeling of the unsteady aerodynamic forces. In the proposed project, we will utilize the servo-tab concept that uses aerodynamic forces to obtain control surface deflections with fractional actuation force. However, the use of servo-tabs with unsteady aerodynamics requires very fast (high bandwidth) actuation and controller since otherwise the system may go unstable. Our proposed piezo actuation solutions will ensure the required bandwidth whereas the MLE controller will assure avoidance of unstable feedback situations. We will also develop a simpler smart flap solution where the piezoactuation is applied directly to the flap through an adequate linear-to-rotary stroke amplifier. Both solutions will be implemented into a smart wing wind tunnel model that will be extensively tested and analyzed. Essential for the project success are the MLE controller algorithms.

The outcome of the proposed project will be a methodology and experimental confirmation of a smart-wing solution for flutter vibration control and gust alleviation, that will enable aircraft to fly faster and more efficiently in turbulent atmosphere under adverse weather conditions. The effective collaboration of Romanian research institutions, academia, and industry will ensure a high technology readiness level (TRL) of the project results with high chances of industrial implementation and patentable innovation.

Device for passive flow control in ducted wind turbines Call name:
PN-II-RU-PD-2010-193 2010 - 2012

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI

Project partners: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO)

Affiliation: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO)

Project website: http://hidraulica.utcb.ro/pd-193

Abstract:

The present project aims the investigation by numerical means of the air flow in ducted horizontal axis wind turbines, with small or medium rotor diameter, placed in sites where wind potential is low or in urban spaces, equipped with passive flow control systems. The prequists to overcome the theoretical limit of Betz and even overrun it may be achieved by shrouding an horizontal axis wind turbine with a convergent-divergent nozzle, with role of concentrating the wind energy. A defining parameter wich dictates the increase in efficiency of a ducted wind turbine is the ratio between minimum section area and the outlet section area of the nozzle. Static pressure is minimal in the minimum section of the casing. As the ratio of these areas is increasing, the distance downstream the rotor where static pressure recovers over the kinetic term increases as well, generating velocity distribution with a higher degree of uniformity in the minimum section of the nozzle. Those conclusions implies large cases relative to the characteristic size of the rotor. The optimization of the shape of the nozzle and flow in the ducted wind turbines, can be made by using passive flow control devices.

Contributions to the optimization of wind turbines design and operation Call name:
PN-II-RU-TD-2007-2-242 2007 - 2008

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI

Project partners: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO)

Affiliation: UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO)

Project website:

Abstract:

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects