نتایج جستجو برای: heating method

تعداد نتایج: 1676584  

Journal: :علوم و فناوری فضایی 0
s. a. hosseini s. noori

in the present work, an engineering method is developed to predict laminar and turbulent heating-rate solutions for blunt reentry spacecraft at hypersonic conditions. the calculation of aerodynamic heating around blunt bodies requires alternative solution of inviscid flow field around the hypersonic bodies. in this paper, the procedure is of an inverse nature, that is, a shock wave is assumed a...

A. R. Abbasian, M. R. Rahimipour, Z. Hamnabard,

In order to evaluate the sintering behavior of lithium meta titanate (Li2TiO3) powder, the shrinkage of powder compact was measured under constant rates of heating. Densification curves for Li2TiO3 have been constructed with the help of shrinkage powder measured at different heating rates. The activation energy at the initial stage of sintering was determined by analyzing the densification curv...

Marashi, P., Ranjbarnodeh, E., Hamdollahzadeh, A., Talebi Hanzaei, A.,

In this study, first,diffusible hydrogen of cellulosic electrode E8010-P1 and low hydrogen electrode E8018-G was measured by mercury displacement method according to ISO3690. Then,the effect of preheating and post-heating on the sensitivity to hydrogen inducedcold cracking in welding of 18mm API5L X70 steel with these electrodes was investigated according to ISO17642-2. The results of visual in...

ABBASI S.M., , ARABI H., , MIRDAMADI SH., , MORAKABATI M., ,

This study was launched to investigate the effects of heating rate and aging parameters on the kinetic of precipitation reactions in a high alloy high strength steel having Ni, Co, Mo and Ti. For this purpose, as quenched specimens were subjected to three types of aging methods with different heating rates. These methods consisted of aging in Pb bath, salt bath, and furnace at different aging c...

2017
Chengning Zhang Xin Jin Junqiu Li Hailong Li

This paper proposes a positive temperature coefficient (PTC) self-heating method, in which EVs can be operated independently of external power source at low temperature, with a lithium-ion battery (LIB) pack discharging electricity to provide PTC material with power. Three comparative heating experiments have been carried out respectively. With charge/discharge tests implemented, results demons...

2010

Subject review People want to have good conditions in their living and existing places. Therefore heating and cooling methods are developed according to different application areas, different heat transfer principles. When we heat a place, the suitability of the placement of heating element and applied heating method need to be examined from the aspect of factors such as effect on human health,...

2009
Ulrich Kunz Thomas Turek

Until recently traditional heating in organic chemistry has been done with oil heating baths or using electric heat exchangers. With the advent of microwave equipment, heating by microwaves was rapidly introduced as standard method in organic chemistry laboratories, mainly because of the convenient possibility to operate at high temperature accompanied by accelerated reaction rates. In the pres...

Journal: :Applied sciences 2022

This work designed an intercalation internal induction heating coil in a mold and drew plate-type steel for the (size: 300 mm × 200 40 mm). First, to explore influence rule of special-shaped coils on effects, temperature rise curve surface was simulated at different depths, currents, frequencies. Next, extent which these three factors affect maximum mean uniformity discussed using Taguchi metho...

2007
Daichi YOSHIDA Yoshihiro HATANAKA Hiroyasu KIFUNE Takao TAKASE Masahiro KOMATSU Hideo OMATA

This paper describes fundamental characteristics of high frequency induction heating applied for Marine Fuel Oil (MFO) recovery system. The system is analyzed for an induction-heating load, related to operating frequency and input power. Frequency domain characteristics of load equivalent circuit parameters in induction heating are investigated to clarify an effective circuit design of the high...

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