Abstract Ice accretion can significantly impact the efficiency and safety of outdoor equipment. Solar‐thermal superhydrophobic surface is an effective strategy for anti‐icing deicing. However, droplets easily turn to Wenzel state during icing melting cycle processes, increasing adhesion making difficult remove from surface. In this work, a triple‐scale solar‐thermal prepared on stainless steel 304 by etching, in situ oxidation, spin‐coating TiN nanoparticles highly efficient deicing...

The icing on transmission line conductor usually causes accidents such as galloping, breaking, tripping, and even network paralyzing, which could bring serious threats to the safe operation of power system. shape not only has a great influence estimate melting ice time or current, but also directly affects mechanical calculation galloping. Therefore, it is paramount determine shape. Many available artificial measurements are inaccurate ineffective enough in some cases. This paper proposes...

Abstract Transparent roofs, such as greenhouse films and architectural glass, play a critical role in optimizing lighting reducing energy consumption. However, conventional solutions are hindered by challenges, frost accumulation winter glare or overheating summer. Here, multi‐functional transparent solar thermal metasurface (TSTM) is presented that integrates anti‐icing/deicing functionality with indoor light management. The TSTM achieves visible transmittance of 0.731, diffusing over 90%...

Air injection is an effective method to eliminate flow separation and improve blade loading in compressors. In existing studies on unsteady air injection, achieving a better control effect than steady with lower consumption major difficulty challenge. this work, pulsed endwall (PEAI) was carried out numerically highly loaded compressor cascade under different frequencies amplitudes. The mechanism through which PEAI influences corner vortical flow, especially the of initial phase field...

Particle deposition tests were conducted in a turbine facility with an internally staged single-tube combustor to investigate the individual effect of gas temperature and angle attack. Sand particles seeded deposited on blade film-cooling holes at temperatures representative modern engines. Fuel-air ratios varied from 0.022 0.037 achieve between 1272 1668 K. Results show that capture efficiency increased increasing temperature. A dramatic increase was noted when exceeded threshold. The...

One of the reliable methods studying engine icing is to carry out testing in an wind tunnel. Due operational limitations test facility, model-size scaling adopted. An method for rotating cone established based on dimensional analysis coupled with similarity theory and evaluated by considering effect. Similarity parameters are determined following five aspects: flow field similarity, droplet trajectory water catch heat balance characteristics similarity. Experimental tests have been performed...

Particle deposition could decrease the aerodynamic performance and cooling efficiency of turbine vanes blades. The particle motion in flow its temperature are two important factors affecting deposition. size influences both temperature. In this study, particles with sizes from 1 to 20 μm first stage a firstly numerically simulated steady method, then on blades unsteady method based critical viscosity model. It is discovered that mainly formed near leading trailing edge pressure surface, area...

The effect of mainstream velocity and temperature on the behavior deposition a flat plate surface has been investigated experimentally. Molten wax particles were injected to generate particle in two-phase flow wind tunnel. Tests indicated that occurs mainly at leading edge middle backward portions windward side. mass was far more than lee sides. For sides, increased as for given concentration. Capture efficiency found increase initially until reaches certain value, where it begins drop with...

In highly loaded tandem compressor cascades, corner separations can still exist. order to eliminate in incoming vortex–corner separation interaction mechanism was investigated. Different schemes of the vortex generators, which located at different pitchwise locations and could generate vortexes with rotation directions, were designed investigated numerically. Results show that, severe occurred front blade passage cascade; by utilizing flow control method interaction, be reduced...

The deposition of liquid particles, which may be converted from solid particles due to high temperature gas heating, makes much more harm on turbine vane blades compared since it block film-cooling holes, worsen the cooling efficiency and aerodynamic performance blades. Due similarity between a surface icing surface, numerical model for simulating was developed based Myers model, an extension Messinger has been applied in predicting aircraft or aero-engine icing. Compared conventional...

As transistor size shrinks due to CMOS scaling (namely the node is 65 nm or less), multi-bit upset (MBU) becomes an increasingly important problem. The mostly adopted error-detection-and-correction codes, including parity code, Hamming code and matrix have limitation of bit numbers detection correction. An emergent technique required deal with cases more than two-bit errors. In this paper, we propose a double address issue. which implemented by two-dimensional codes logic interleaving, taken...

Counter-rotating (CR) compressor is a potential configuration to increase the thrust-to-weight ratio of aero-engines. The present study numerically investigated dual-stage CR by solving unsteady Reynolds-averaged Naiver–Stokes equations. flow mechanisms were analyzed and compared for swept baseline (radially stacked) rotors. Both these rotor configurations simulated entire design speed line. field near mid-span blade tip characterized leakage vortex (TLV) was in detail both peak efficiency...

Abstract Ice crystal ingestion at high altitude has been reported to be a threat for safe operation of aero-engine in recently. crystals do not accrete on external surface because cold environment. But when they enter the core flow aero-engine, ice melt partially into droplets due higher temperature. Air-droplets-ice is mixed-phase, which will give rise accretion static and rotating components compressor. Subsequently, compressor surge engine shutdowns may occur. To provide numerical tool...

An investigation of microstrip-fed cavity-backed cross slot antennas using an elliptic cavity is presented in this letter. The antenna has two crossed radiating slots printed on the bottom substrate and behind slots. Two dual-arm lines are used to excite which etched upper side substrate. metal sheet placed at a distance between 10% low-frequency wavelength high-frequency above enhance gain. With use backed by one cavity, dual band polarization have been realized. simulated bandwidth(10dB...

This paper introduces the background and basic theory of flexible repeater technology, then analyses working process principle on Wideband Gapfiller Satellite (WGS), summarizes key technologies during implementation. Meantime, for solving large capacity multi-beam connection problems in mobile satellite communication system, provides necessary basis theoretical technical support. Finally, by comparing tradition repeaters with repeater, this points out possesses virtue high power efficiency...