... extension ratio on the leakage rate of the D-HPDS is further investigated to verify the correctness of numerical simulation results. Figure 20 shows a schematic diagram and a photograph of the test rig designed for a flat-plate clearance seal. The test system is composed of a pressurized gas supply system...

... numerical simulation Fig. 21 Seal leakage flow rate versus inlet preswirl ratio ( Δ P =   8.27 bar, n  = 2 krpm) Seal leakage flow rate versus inlet preswirl ratio (ΔP= 8.27 bar, n = 2 krpm) Figure 22 shows the seal drag power loss versus inlet preswirl ratio. Increasing inlet...

... rotordynamic damping. This assumption will be validated below through the comparison of the cavity force coefficients. For the steady solutions, the desired convergent target of each numerical simulation is that the root mean square (RMS) residuals [( 19 )] of the momentum and mass equations, energy...

... stage, NASA rotor stage 37, has been numerically simulated. The evaluation of results on various performance parameters, such as total pressure ratio, inlet flow capacity, and adiabatic efficiency combined with contours of total pressure losses, entropy, Mach number, and temperature including limiting...

...Mingcong Luo; Qun Zheng; Lanxin Sun; Qingfeng Deng; Song Li; Chunlei Liu; Rakesh K. Bhargava The inlet fogging effects on the stable range of a NASA transonic compressor stage, Stage 35, are numerically simulated and analyzed in this paper. The 3D two-phase flow fields in the compressor stage...

...Zhigang Li; Jun Li; Xin Yan; Zhenping Feng Effects of pressure ratio and rotational speed on the leakage flow and cavity pressure characteristics of the rotating staggered labyrinth seal were investigated by means of experimental measurements and numerical simulations. The rotating seal test rig...

... the requirements of modern gas turbines: high specific power density, high turbine inlet temperature, and low NO x emissions. The basis for the research work is numerical simulation. With the focus on pollutant emissions, a detailed chemical kinetic mechanism is used in the calculations. A novel mixing control...

... Documentation , AEA Technology, Software Ltd. , Waterloo, ON, Canada . 03 03 2009 17 06 2009 16 03 2010 16 03 2010 flow simulation honeycomb structures Navier-Stokes equations seals (stoppers) labyrinth honeycomb seal leakage flow numerical simulation...

...Hongsheng Guo; W. Stuart Neill; Gregory J. Smallwood The effect of water addition on NO formation in counterflow CH 4 /air premixed flames was investigated by numerical simulation. Detailed chemistry and complex thermal and transport properties were employed. The results show that the addition...

... is the numerical simulation of flow and combustion in a FLOX®-combustor [ Wünning, J. A., and Wünning, J. G., 1997, “Progress in Energy and Combustion Science,” 23, pp. 81–94; Patent EP 0463218 ] at high pressure operating conditions with emphasis on the pollutant formation. FLOX®-combustion is a highly turbulent...

... for numerical simulation. Modeling the test flame with nonreflecting outlet conditions did not result in any combustion instabilities, neither with adiabatic nor with isothermal walls and without accounting for radiative losses in both cases. Nevertheless, the flow field looks relatively similar regarding...