On the rotor blade pressure surface,the dominant frequencies of unsteady surface pressure are the up-stream blade wake passing frequency and its harmonics,and the amplitudes of pressure fluctuations decrease from leading edge to trailing edge.
Based on the analytical theory study, numerical calculation with the finite elementmethod and test investigations, the calculating formula of matching coefficient of surface pressure transducer for buried structures is presented.
The surfactants have two long alkyl chains, and both of them are C8, C10, C12, C14, C16, C18, and C18△9,10 respectively. The structures of the products were identified by IR and NMR. Through measurement of the interfacial tension and surface pressure, the surface activities were studied.
It was found that at the low surface pressure during the compress process the linear or piece shape domain appeared with the DMPC/β -casein or the DMPC/β- lactoglobulin complex monolayer, respectively.
Using surface pressure,height and temperature data at 850 and 500 hPa. and rainfall records in Guangdong stations for July-September, 1982, power spectrum, cross spectrum, coagulation spectrum and correlation coefficient are derived in this paper.
The results of numerical simulations show that all the three schemes can release the aridfication in the northwestern part of china. The scheme of transforming desert to forest land can increase the average surface pressure( + 0.25 hPa) as well as precipitation rate( + 0.60 mm/day) and decrease the surface temperature( - 0. 52 1C ).
One is the B-type staggered grid model. The another is the A-type non-staggered grid model. The tentative experimental results show: The B-type grid model is stable in computing, its forecast ability of surface pressure system and weatbe-prognostics, in sdme ways, is much better than that of the fundamental model.
Plane cascade tests were carried out for the cascade under four inlet flow angles and three outlet isentropic Mach numbers, and the important parameters such as surface pressure on blade, outlet flow angle and cascade losses were measured.
A study was performed of the change under the curved blade a ction of the blade profile pressure distribution, Mach number contour lines and blade surface pressure distribution. Meanwhile, an investigation was conducted o f the effect of blade curving on the location of horseshoe vortex and passage vo rtex formation.
It was found that the surface tension (surface pressure) can be insufficiently sensitive to conformational transformations in the surface polymer films.
The specific heat of wetting, q = 36 mJ/m2, and the surface pressure of adsorbed water film, π = 48 mJ/m2, were determined from adsorption-calorimetric experiment on macroporous disperse silica modified with polymethylhydrosiloxane GKZh-94M.
The adsorption of α1-acid glycoprotein into bilirubin/cholesterol mixed monolayers with various component molar ratios is investigated using surface pressure-area (π-A) isotherms and (dπ/dA)-A curves.
The adsorption of glycoprotein into a monolayer induced changes in molecular surface area depending on the surface pressure and molar fraction of bilirubin.
At the surface pressure below 10 mN/m, dynamic surface properties of these films coincide with those of poly(ethylene oxide).