Simplified Modeling of Deflagration in VesselsSpringer Science and Business Media LLC - Tập 18 - Trang 1338-1348 - 2004
Joon Hyun Kim, Joo-Hyun Kim
A simplified method that models the deflagration process occurring in closed or vented vessels is described. When combustion occurs within the spherical or cylindrical vessels, the flame moves spherically or segmentally to the vessel periphery. The volume and area of each element along the propagating flame front are calculated by using simple geometrical rules. For instabilities and turbulence re...... hiện toàn bộ
An investigation of design parameter and atomization mechanism for air shrouded injectorsSpringer Science and Business Media LLC - Tập 17 - Trang 751-757 - 2003
Ki-Hyung Lee, Chang-Sik Lee, Bong-Gyu Kim, Hae-Young Jeong
With increasing requirements for the less harmful exhaust emissions and the better fuel economy, the conventional injectors in gasoline engines can be replaced by the air shrouded injector in order to provide improved combustion in engine operations. To find out the optimal shape of air shrouded atomizer attached to the conventional injector nozzle, the critical design parameters such as droplet s...... hiện toàn bộ
An ALE finite element method for baffled fuel container in Yawing motionSpringer Science and Business Media LLC - Tập 18 - Trang 460-470 - 2004
Jin-Rae Cho, Hong-Woo Lee, Wan-Suk Yoo, Min-Jeong Kim
A computational analysis of engineering problems with moving domain or/and boundary according to either Lagrangian or Eulerian approach may encounter inherent numerical difficulties, the extreme mesh distortion in the former and the material boundary indistinctness in the latter. In order to overcome such defects in classical numerical approaches, the ALE (arbitrary Lagrangian Eulerian) method is ...... hiện toàn bộ
Creep life prediction for udimet 720 material using the initial strain method (ISM)Springer Science and Business Media LLC - Tập 17 - Trang 469-476 - 2003
Yu-Sik Kong, Han-Ki Yoon, Sae-Kyoo Oh
Despite of considerable research results of uniaxial tension creep available for superalloys, few studies have been made on high temperature creep using the Initial Strain Method (ISM). In this paper, the real-time prediction of high temperature creep strength and creep life for the nickel-based superalloy Udimet 720 (high-temperature and high-pressure gas turbine engine materials) was performed o...... hiện toàn bộ
Development of a criterion for efficient numerical calculation of structural vibration responsesSpringer Science and Business Media LLC - Tập 17 - Trang 1148-1155 - 2003
Woonkyung M. Kim, Jeung Tae Kim, Jung Soo Kim
The finite element method is one of the methods widely applied for predicting vibration in mechanical structures. In this paper, the effect of the mesh size of the finite element model on the accuracy of the numerical solutions of the structural vibration problems is investigated with particular focus on obtaining the optimal mesh size with respect to the solution accuracy and computational cost. ...... hiện toàn bộ