Results 11 to 20 of about 1,013,931 (235)

Experimental and simulation study on oscillating flow and heat transfer characteristics of the cooling gallery in steel pistons

open access: yesCase Studies in Thermal Engineering
To characterize the oscillating flow and heat transfer characteristics of the cooling gallery inside a steel piston, a visual experimental platform was designed and constructed.
Yang Liu   +5 more
doaj   +2 more sources

Comparison of the effects on heat transfer through oil oscillation in a steel piston cooling gallery: Friction welding versus laser welding

open access: yesCase Studies in Thermal Engineering
Piston cooling gallery plays a critical role in managing the temperature of the piston and its performance. This paper aims to study the effect of oscillatory heat transfer within the cooling galleries, focusing on two distinct types: flanged (friction ...
Min Li   +5 more
doaj   +2 more sources

Research on the oscillating flow and heat transfer of the cooling gallery inside a multi-material composite piston

open access: yesCase Studies in Thermal Engineering
The heat transfer ability of cooling gallery inside high-strengthened diesel engine composite piston is highly required. This article established an oscillating heat transfer model for gas-liquid two-phase flow of cooling gallery.
Haixiang Yang   +6 more
doaj   +2 more sources

Optimization of the Location of the Oil Cooling Gallery in the Diesel Engine Piston [PDF]

open access: yesThe Open Mechanical Engineering Journal, 2016
The oil cooling gallery is arranged at the top of the piston, which can effectively reduce the heat load of the piston. In this paper, finite element analysis and fatigue analysis by FE-safe are used to calculate the effects of the different positions of the oil cooling gallery to the temperature, stress field and the fatigue strength of the bowl rim ...
Lijun Deng   +4 more
openaire   +3 more sources

Optomechanical cooling and self-stabilization of a waveguide coupled to a whispering-gallery-mode resonator [PDF]

open access: yesPhotonics Research, 2020
Laser cooling of mechanical degrees of freedom is one of the most significant achievements in the field of optomechanics. Here, we report, for the first time to the best of our knowledge, efficient passive optomechanical cooling of the motion of a freestanding waveguide coupled to a whispering-gallery-mode (WGM) resonator. The waveguide is an 8 mm long
Riccardo Pennetta   +4 more
openaire   +4 more sources

A gallery of cool hypergiants — imaging their circumstellar environments [PDF]

open access: yesSymposium - International Astronomical Union, 2003
High resolution imaging with HST-wfpc2 of seven of the most luminous evolved cool stars shows that the three OH/IR stars NML Cyg, VX Sgr and S Per have circumstellar nebulae while no ejecta was detected for the M-type supergiant μ Cep and the yellow hypergiants ρ Cas, HR 8752 and HR 5171a.
Michael T. Schuster   +4 more
openaire   +1 more source

Experimental Study on the Effectiveness of Water Mist Extinguishing Systems for Protecting Paintings in Art Gallery Museums: Developing an Initial Methodological Model

open access: yesBuildings, 2023
Determining the input parameters for the calibration of a water mist extinguishing system in a compartment is important for the evaluation of the performance of the design.
Davide Berardi   +2 more
doaj   +1 more source

Doppler Cooling a Microsphere [PDF]

open access: yes, 2010
Doppler cooling the center-of-mass motion of an optically levitated microsphere via the velocity-dependent scattering force from narrow whispering gallery mode resonances is described.
Barker, PF
core   +2 more sources

Stable yellow light emission from lead-free copper halides single crystals for visible light communication

open access: yesNano Materials Science, 2023
Yellow light-emitting diodes (LEDs) as soft light have attracted abundant attention in lithography room, museum and art gallery. However, the development of efficient yellow LEDs lags behind green and blue LEDs, and the available perovskites yellow LEDs ...
Baiqian Wang   +8 more
doaj   +1 more source

Optomechanical Transduction and Characterization of a Silica Microsphere Pendulum via Evanescent Light [PDF]

open access: yes, 2015
Dissipative optomechanics has some advantages in cooling compared to the conventional dispersion dominated systems. Here, we study the optical response of a cantilever-like, silica, microsphere pendulum, evanescently coupled to a fiber taper.
Chormaic, Síle Nic   +4 more
core   +2 more sources

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