نتایج جستجو برای: high pressure turbomachinery
تعداد نتایج: 2350039 فیلتر نتایج به سال:
high blood pressure has become increasingly commonbetween people and also it takes a major risk factor for many diseases. the present study is done toperformthe collaborative care model in patients with high blood pressure. hypertension is defined as: systolic blood pressure (sbp) ≥140 mmhg or diastolic blood pressure (dbp) ≥90 mmhg .a collaborative care model is a native educating method based...
marbles containing high-pressure mineral assemblage was found from the sanandaj-sirjan metamorphic belt in the nahavand area in western iran. the high-pressure marbles occur as small bodies or lenses within pelitic schist layers and show compositional banding of carbonate- and silicate- rich bands. textural analysis revealed two metamorphic stages. the early stage is testified by relicts of ...
The hub and casing walls of axial compressors are often modeled as smooth continuous surfaces in CFD simulations, but real geometries, non-smooth pinches, steps leakage cavities may exist. In the GPPS first Turbomachinery Workshop, a comprehensive validation verification campaign RANS flow solvers was conducted, all simulation results consistently over-predicted total pressure ratio at rotor ex...
Abstract As the next generation of turbomachinery components becomes more sensitive to instrumentation intrusiveness, a reduction number measurement devices required for evaluation performance is possible and cost-effective way mitigate arising non-mastered experimental errors. A hybrid methodology that couples techniques with modeling through Bayesian data-driven framework employed reduce effo...
Turbomachinery shafting and casings typically experience axial growth during thermal transients occurring at startup, shutdown, and changes of load. This growth does not usually present difficulties during operation. However, this paper discusses four recent turbomachinery trains that experienced radial subsynchronous vibration resulting from axial misalignment. In each example, the train inclu...
Abstract This paper presents the high-order Penalized Vortex in Cell method applied to flow past an airfoil with a cavity and T-106A turbine cascade. The first part of treats about parallel environment algorithm performance where times for each operation are measured. Then further validation on cylinder at Re=9500 was shown, simulation results were extended. For unbounded stream-function correc...
Accurate prediction of aerodynamic damping is essential for flutter and forced response analysis turbomachinery components. Reaching a high level confidence in numerical simulations requires that the models have been validated against experiments. Even though number test cases established over past decades, there still lack suitable detailed data can be used validation purposes particular when ...
Cavitation is a phase change phenomenon generated by the static pressure reduction of liquid medium at constant temperature. This process has been considered as disadvantageous mechanism in most turbomachinery systems, however, its potential releasing energy bubble collapse stage received lots attention recent decades. Particularly, applicability this micro scale gives rise to research studies ...
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