نتایج جستجو برای: high pressure turbomachinery

تعداد نتایج: 2350039  

2007
DONGHYUN YOU MENG WANG PARVIZ MOIN RAJAT MITTAL

The tip-leakage flow in a turbomachinery cascade is studied using large-eddy simulation with particular emphasis on understanding the underlying mechanisms for viscous losses in the vicinity of the tip gap. Systematic and detailed analysis of the mean flow field and turbulence statistics has been made in a linear cascade with a moving endwall. Gross features of the tip-leakage vortex, tip-separ...

Journal: :middle east journal of digestive diseases 0
anahita sadeghi ali ali asgari

abdominal wall hernias are common problems found in patients with cirrhosis because of persistently high intra-abdominal pressure. when abdominal hernias are neglected in such patients, they may become larger and could result in cosmetic problems and pressure effects that are also difficult to treat. we found a voluminous mass in the anterior abdominal wall of a 40-year-old patient with cirrhos...

Journal: :jundishapur journal of natural pharmaceutical products 0
nasrollah ghassemi department of pharmacognosy, school of pharmacy, isfahan university of medical sciences, isfahan, ir iran mustafa ghanadian department of pharmacognosy, school of pharmacy, isfahan university of medical sciences, isfahan, ir iran; department of pharmacognosy, school of pharmacy, isfahan university of medical sciences, isfahan, ir iran. tel: +98-3117922553 lili ghaemmaghami department of biology, faculty of science, university of isfahan, isfahan, ir iran haran kiani isfahan pharmaceutical sciences research center, isfahan university of medical sciences, isfahan, ir iran

background ziziphora tenuior l. known as kakuti in persian, is used in traditional medicine for fever, dysentery, uterus infection and as an analgesic. it is used also in the treatment of gastrointestinal disorders as carminative, or remedy of diarrhea or nausea. major components of plant essential oil including pulegone, isomenthone, thymol, menthone, and piperitone are suggested to be respons...

Journal: :health scope 0
ali nazeri reference health laboratory research center, ministry of health and medical education, tehran, ir iran maryam jalali noor pathobiology laboratory, tehran, ir iran mehri aliasgharpour reference health laboratory research center, ministry of health and medical education, tehran, ir iran; reference health laboratory research center, ministry of health and medical education, tehran, ir iran. tel: +98-9124713790, fax: +98-2166728121 farideh khosravie noor pathobiology laboratory, tehran, ir iran

background valproic acid is widely used as an anticonvulsant and mood-stabilizing drug in the treatment of epilepsy. determination of serum valproic acid is required in epilepsy therapy for efficient control of seizures. objectives in the present study, the gas chromatography method was applied to determine serum valproic acid and resulting data were compared with those obtained by high perform...

Journal: :International Journal of Aeroacoustics 2010

Journal: :The Proceedings of Mechanical Engineering Congress, Japan 2020

Journal: :The International Journal of Acoustics and Vibration 2001

Journal: :Fluids 2021

The problem of laminar to turbulent transition in a boundary layer flow subjected an adverse pressure gradient is relevant many engineering applications. Under such conditions, the initially within can undergo separation and then become upon reattachment, as triggered by instabilities separated shear layer. In turbomachinery blades with high loading, mechanism further complicated presence perio...

2014
Pengfei Li Yaoyu Li John E. Seem

In this paper, the transient model of a water-cooled centrifugal chiller is developed in Modelica with Dymola and the TLK/IfT Library (TIL). The centrifugal compressor is modeled in detail based on the turbomachinery theory. The chiller capacity control is achieved by the combination of variable inlet guide vane (VIGV) and variable speed drive (VSD). The shell-and-tube heat exchangers are discr...

2006
Donghyun You Meng Wang Rajat Mittal Parviz Moin

Large-eddy simulations of pairs of artificially generated longitudinal vortices embedded in a two-dimensional turbulent boundary layer are performed to study the dynamics of the vortical structures and to provide the unsteady inflow data for use in a future turbomachinery simulation. An immersed boundarymethod is employed to represent the wall-mounted half-delta wings that generate the counter-...

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