Abstract New alternative jet fuels have provided many advantages in the aviation industry, especially terms of economics and environment. However, fuel–seal compatibility is one major issues that restricts fuel advancement into market. Thus, to help understand solve problem, this study examines swelling effect prepared non-prepared O-rings different aromatic species. Stress relaxation experimen...

shape is regarded as one of outward characteristics of islamic seals. this characteristic, which is part of common traits of all different areas of seal studies, could be defined as framework of circumference of seals impression on written materials and documents, which in fact results from the shape of seals surfaces. shape has been considered as one of the ways of recognizing the administrati...

Abstract Interfacial surface roughness can result in fluid leakage of seals, and the design seals it is standard to give an upper limit for root-mean-square (rms) amplitude $$h_\text{rms}$$ h rms . However, determined mainly by long-wavelength roughness, which (ne...

The interaction of work fluid mechanics with that of the rotary system itself, basically composed of axes, bearings and rotors, is performed by inserting equivalent dynamic coefficients in the mathematical model of the rotor, the latter being obtained by the finite element method. In this paper, the dynamic coefficients of inertia, stiffness and damping of the flat seals analyzed here are evalu...

seals can help to identify the unknown aspects a culture. parthian seals and bullaes not only have played an important role in business in the community, but also they are important to identify the art and culture of this period. except a few reports about parthian site and a few works that can be found in collections and museums little has been written with regard to the seals of this period. ...