Universiteto produkcija / University's production: Recent submissions
Now showing items 241-260 of 2313
-
Long-term properties of foamed concrete
(International Conference Modern Building Materials, Structures and Techniques (MBMST 2019), 2019)Foamed concrete has been used as a building material since the early 1920s. In the beginning, it was used as an insulation material with very low density. Since then there have been attempts to improve the structural ... -
Mechanical properties of solid glass bricks
(International Conference Modern Building Materials, Structures and Techniques (MBMST 2019), 2019)Glass as one of the oldest building materials has been used for centuries to fill window openings. In recent years is it increasingly used also for load-bearing structural elements such as beams, columns, ribs, railings, ... -
Influence of activation of microsphere and latex base addition on mechanical properties of concrete
(International Conference Modern Building Materials, Structures and Techniques (MBMST 2019), 2019)In a modern civil engineering, it is important to erection construction in extremely complicated and difficult environmental conditions. Additives and admixes to concrete enable to achieved higher mechanical properties of ... -
Wall blocks based on the aggregates from plant wastes
(International Conference Modern Building Materials, Structures and Techniques (MBMST 2019), 2019)The article considers the possibility of using agricultural waste in the development of new building materials in the form of wall blocks. When selecting the compositions, the ideal fractions and ratios of straw to flax ... -
The workability kinetics of phosphogypsum binder
(International Conference Modern Building Materials, Structures and Techniques (MBMST 2019), 2019)The dihydrate phosphogypsum (PG) based binder workability kinetics were investigated regarding to water-binder ratio (W/B) and chemical admixtures added to the composition of PG paste. PG was dried at 60 °C and homogenized ... -
The effect of glass powder on physical and mechanical properties of hardened cement paste
(International Conference Modern Building Materials, Structures and Techniques (MBMST 2019), 2019)The article analyses the effect of finely crushed glass on the properties of hardened cement paste. Materials used for the test: Portland cement CEM I 42.5 R, finely crushed glass (particle size ≤75 µm), and water. Seven ... -
Investigations on lightweight concrete prepared by combinations of rubber particles and expanded glass aggregate
(International Conference Modern Building Materials, Structures and Techniques (MBMST 2019), 2019)Lightweight concrete is a very useful building material used in the construction sector for providing better insulation and lower energy consumption. Properties of lightweight aggregate, water-cement ratio, and other ... -
Evaluation of physical and mechanical properties of fired-clay bricks incorporating both mineral and organic wastes
(International Conference Modern Building Materials, Structures and Techniques (MBMST 2019), 2019)The clay brick is one of the oldest building materials, and as the use of waste in the bricks can reduce clay consummation and the environmental burden due to the accumulation of waste, the present study was chosen, the ... -
Validation of hybrid numerical methods for aeroacoustic simulations in an industrial environment
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)Airframe noise from deployed slats is considered to be the main contributor to the overall aircraft noise during approach and landing of modern airliners. Since it is generated in the vicinity of edges such as the slat ... -
Parametric study of air curtains for airframe noise reduction
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)The advancement of European society is dependent on safe, efficient, and environmentally-friendly technologies. It is an on-going challenge for European industry to meet customer and legislative requirements, satisfy ... -
Slat noise reduction by means of adaptive leading edge devices
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)Slat noise is regarded as the major noise source of state of the art high lift systems and contributes to the overall aircraft noise signature in particular during the approach phase [1]. Consequently any attempt to reduce ... -
Active control of noise generation in a rod-airfoil configuration
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)Flow control and adaptive techniques have been widely investigated as possible noise reduction approaches in modern aviation. Despite extensive studies realized on the aerodynamics of a rotating cylinder (i.e. [1, 2]), its ... -
On active noise reduction in an aircraft cabins and engine nozzles
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)An analytical approach to active noise reduction is presented in the case of a line-source in a cylindrical enclosure, minimizing the noise in a sector, corresponding to the ‘passenger head area’ of an aircraft cabin. The ... -
Experience of the National Aviation University in the application of active noise control in an aircraft cabin
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)This presentation is focused on the problem of noise reduction in the aircraft cabins including cockpits. The noise has an adverse effect on the crew first of all, since it is disturbing, tiring, and interferes with transfer ... -
Active control of fan tones by means of trailing edge blowing
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)At DLR in Berlin, a series of experiments was performed on a laboratory scale fan rig to explore the potential of trailing edge blowing (TEB) for the attenuation of tonal noise of an axial fan stage for the first three ... -
STAR: an efficient micro-jet simulator for active control in CEPRA19. Some applications
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)The need to evaluate news methods of jet noise reduction, amongst them shear layers active control with continuous or pulsed microjet concepts led the Onera Wind Tunnel Division to develop in the large anechoic facility ... -
Increase and decrease of the noise radiated by high-Reynolds-number subsonic jets through plasma synthetic jet actuation
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)Since the discovery of the existence of largescale structures in high-Reynolds-number free shear flows [1] and their role in the radiation of noise to the far field [5], the control of their dynamics has been an important ... -
On instability wave control in turbulent jets
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)The presentation is based on two main results obtained in the framework of international projects OPENAIR and Orinoco. Two considered effects are determined by control of large scale structures in the initial part of shear ... -
Correlative analysis of noise propagation
(Abstracts of the International Conference “Acoustic climate inside and outside buildings”, 2014, 2014)Noise created by traffic is one of the major problems of environmental quality in Europe. It is related to an increasingly growing dissatisfaction of the public with the current situation. In most cities, noise increases, ...