Results 21 to 30 of about 15,763 (213)

Impact of the turbulence modeling approach on the accuracy of the fan noise level prediction

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2018
The fan is the dominant source of noise for modern high bypass ratio aircraft engines. The article presents the results of investigating the influence of the approach to modeling the turbulence in modeling fan stage noise generation on the results of ...
K. R. Pyatunin, N. V. Arkharova
doaj   +1 more source

Research of the operability of an air-fuel lubrication and cooling system of gas turbine engine rotor bearings

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2019
The article is devoted to the problem of ensuring the operability of air-fuel lubrication and cooling systems for gas turbine engine (GTE) rotor bearings. The paper considers one of the advanced designs of a GTE in which an air-fuel mixture obtained in a
V. N. Klimov, D. Ya. Dud’ev, V. Ya. Sigaylo, N. I. Klimov, Yu. K. Mashkov   +4 more
doaj   +1 more source

An example of use of gas turbine engine compressor, which has been mastered in production and has good characteristics in a new product project [PDF]

Омский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2022
The development of a new gas turbine engine requires a lot of time and money spent on the design and testing its compressor, which has been shown as the most complex and time-consuming assembly unit of the engine.
A. V. Grekhnev
doaj   +1 more source

Forecasting low-cycle fatigue life of gas-turbine engine parts by the method of equivalent tests for specimens with stress concentrator under extension-compression

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2018
A method of low-cycle fatigue equivalent tests based on the application of test specimens whose stress-strain state shall be similar to the stress-strain state of the part to be investigated is proposed in the paper.
S. A. Bukatyy, A. V. Pakhomenkov, G. A. Solntsev, A. S. Bukatyy   +3 more
doaj   +1 more source

Design of microstrip microwave phase shifters for antenna arrays

Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2017
The analysis of the features of microstrip discrete reflective phase shifters is given. The principle of forming multi-bit phase shifters based on the transmission-type phase shifter is presented.
E. M. Glushechenko
doaj   +1 more source

Was the northern hexagon of Saturn seen from Earth before Voyager 1? Further researches. [PDF]

Cultural Heritage and Modern Technologies
Saturn's atmospheric boreal hexagon, discovered by the Voyager 1 probe in 1981, has such dimensions – sides km. 13800; total extension in length almost km.
Ferreri W., Codebo M., Bubbi B., De Santis H., Citernesi L.   +4 more
doaj   +1 more source

p16Ink4a‐Positive Hepatocytes Drive Liver Fibrosis Through Activation of LIFR Family Pathway

Advanced Science, EarlyView.
This study found that, following the long‐term CCl4 treatment, p16high hepatocytes appeared in zone 3, spatially co‐localizing with fibrotic areas. A specific cluster of p16high hepatocytes upregulated CTF1/LIF expression which induced HSC activation and further liver fibrosis, as revealed by single cell transcriptomic analysis.
Koji Nishikawa, Teh‐Wei Wang, Satoshi Kawakami, Shota Tanimoto, Kiyoshi Yamaguchi, Taketomo Kido, Masamichi Kimura, Tsunekazu Hishima, Yuki T. Okamura, Satotaka Omori, Takumi Iritani, Toshikaze Chiba, Takehiro Jimbo, Michio Katano, Kansuporn Kamataki, Ryoichi Yokoyama, Eigo Shimizu, Kiminori Kimura, Satoshi Yamzaki, Seiya Imoto, Yoichi Furukawa, Atsushi Miyajima, Yoshikazu Johmura, Makoto Nakanishi   +23 more
wiley   +1 more source

Tuning High Temperature Performance Through Targeted Halide Substitution in a Bis(Imino)Pyridine‐Iron Ethylene Polymerization Catalyst

Journal of Applied Polymer Science, EarlyView.
Through systematic developments in catalyst design, we report a series of exceptionally active on iron catalysts for the polymerization of ethylene that can run at high operating temperature forming highly linear polyethylene waxes with narrow dispersity and high levels of vinyl chain ends that could be influenced by the operating temperature.
Elizabeth Ogbe, Yanping Ma, Yizhou Wang, Gregory A. Solan, Qiuyue Zhang, Tongling Liang, Wen‐Hua Sun   +6 more
wiley   +1 more source

Improvement of bearing support lubrication [PDF]

Vestnik MGTU, 2016
Gas turbine engine bearing supports is an important part in providing product efficiency of general and special-purpose engineering industry. Attempts are being made to increase efficiency of bearing support.
Shehovtseva E. V.
doaj   +1 more source

Generalized Chemical Model for Warm Dense Hydrogen: Ionization Potential Depression and Molecular Dissociation Shifts

Contributions to Plasma Physics, EarlyView.
ABSTRACT Warm dense matter (WDM) is a complex state, where quantum effects, thermal excitations, and strong interparticle correlations coexist. Understanding its microscopic composition and medium‐induced modifications of atomic and molecular properties is essential for planetary modeling, fusion research, and high‐energy‐density experiments.
L. T. Yerimbetova, Yu. V. Arkhipov, Ye. S. Mukhametkarimov, A. E. Davletov, I. M. Tkachenko   +4 more
wiley   +1 more source