azmeera, anitha kumari jadhav, prakash lande, chhaya
In aerospace applications, engine parts, especially those around the rotor blade tips, are coated with an abradable seal, a specific material layer. Its design produces a tighter seal without harming the blades by allowing it to wear down or “abrade” somewhat when the blade tips come into contact. In turbines and compressors, this reduces gas leaka...
wilson, kellie n. jaman, golam gause thapa, anish vivekananda, amirthavarshini lowe, mitchell grima, zachary schoen, marco p.
Stall events in axial compressor systems have been a limiting factor for efficiency of such systems and a source of safety concerns. The detection of the onset of stall, and in many cases the precursor of the onset of stall, have been of interest in the axial compressor community for many decades. As such, development of algorithms along with activ...
casoni, marco magrini, andrea benini, ernesto
The accurate prediction of the aeroelastic behavior of turbomachinery for aircraft propulsion poses a difficult yet fundamental challenge, since modern aircraft engines tend to adopt increasingly slender blades to achieve a higher aerodynamic efficiency, incurring an increased aeroelastic interaction as a drawback. In the present work, we present a...
yan, wei bowen, wu pan, jiabao dongdong, ye fuyang, chengming
In response to vibration problems caused by unbalanced faults in multi-disk rotor systems of compressors, this research study proposes a new type of integral damping bearing (IDB) with an integral structure and better damping performance. The IDB’s stiffness and damping coefficients were acquired through computational fluid dynamics (CFD) analysis....
witanowski, łukasz
The urgent need for environmentally sustainable cooling technologies, driven by global regulatory constraints, has intensified the search for natural refrigerants with low global warming potential. This study evaluates the potential of natural refrigerants, specifically butane and isobutane, in advanced single- and dual-fluid Organic Rankine Cycle–...
molinaroli, luca lucchini, andrea maria colombo, luigi pietro
The study presents the results of an experimental investigation aimed at evaluating the performance of a water-to-water heat pump utilising R1234ze(E) and R515B in a drop-in application. Several operating conditions are tested, varying the mass flow rates and temperatures of the secondary fluids that pass through the heat exchangers while maintaini...
chen, shuangqing yu, ze yuchun, li wang, zhihua minglin, si
In the early construction of an underground gas storage facility in an oil and gas field in southwest China, the increasing gas injection volume led to a continuous rise in energy consumption, which affects the economic sustainability of gas injection and extraction. In order to improve efficiency and reduce energy consumption, optimization of the ...
umyshev, dias raybekovich osipov, eduard vladislavovich kibarin, andrey anatolievich korobkov, maxim sergeyevich petukhov, yuriy viktorovich
Liquid air energy storage (LAES) is one of the most promising technologies for power generation and storage, enabling power generation during peak hours. This article presents the results of a study of a new type of LAES, taking into account thermal and electrical loads. The following three variants of the scheme are being considered: with single-s...
Boniface, Jean-Christophe Petropoulos, Ilias Berhouni, Ilyes
In the continuation of ongoing works at ONERA, aiming at performing exergy-based analyses of steady numerical solutions corresponding to complex internal or external flows, this paper presents a first application to the performance investigation of the NASA SDT configuration. Different operating conditions at take-off rotational speed were consider...
štětka, petr
Tato bakalářská práce se zabývá optimalizačním návrhem radiálního kompresoru na superkritický oxid uhličitý (sCO2). V teoretické části se zaměřuje na problematiku superkritického oxidu uhličitého, jeho průmyslové využití a ztráty kompresorů. Praktická část se soustředí na výpočet a optimalizaci návrhu radiálního kompresoru pro sCO2, přičemž hlavním...
