This paper presents a new microcomputer-based hydro-turbine governor type SWT and introduces the system structure and the main function of the governor. By comparison with other governors used at present, the paper ex...This paper presents a new microcomputer-based hydro-turbine governor type SWT and introduces the system structure and the main function of the governor. By comparison with other governors used at present, the paper expounds the merits of the SWT microcomputer-based governor.展开更多
Hugoniot curves and shock temperatures of gas helium with initial temperature 293 K and three initial pressures 0.6,1.2,and 5.0 MPa were measured up to 15000 K using a two-stage light-gas gun and transient radiation p...Hugoniot curves and shock temperatures of gas helium with initial temperature 293 K and three initial pressures 0.6,1.2,and 5.0 MPa were measured up to 15000 K using a two-stage light-gas gun and transient radiation pyrometer.It was found that the calculated Hugoniot EOS of gas helium at the same initial pressure using Saha equation with Debye-Hückel correction was in good agreement with the experimental data.The curve of the calculated shock wave velocity with the particle velocity of gas helium which is shocked from the initial pressure 5 MPa and temperature 293 K,i.e.,the D^u relation,D=C_(0)+λu(u<10 km/s,λ=1.32)in a low pressure region,is approximately parallel with the fitted D^u(λ=1.36)of liquid helium from the experimental data of Nellis et al.Our calculations show that the Hugoniot parameterλis independent of the initial densityρ_(0).The D^u curves of gas helium will transfer to another one and approach a limiting value of compression when their temperature elevates to about 18000 K and the ionization degree of the shocked gas helium reaches 10^(-3).展开更多
文摘This paper presents a new microcomputer-based hydro-turbine governor type SWT and introduces the system structure and the main function of the governor. By comparison with other governors used at present, the paper expounds the merits of the SWT microcomputer-based governor.
文摘Hugoniot curves and shock temperatures of gas helium with initial temperature 293 K and three initial pressures 0.6,1.2,and 5.0 MPa were measured up to 15000 K using a two-stage light-gas gun and transient radiation pyrometer.It was found that the calculated Hugoniot EOS of gas helium at the same initial pressure using Saha equation with Debye-Hückel correction was in good agreement with the experimental data.The curve of the calculated shock wave velocity with the particle velocity of gas helium which is shocked from the initial pressure 5 MPa and temperature 293 K,i.e.,the D^u relation,D=C_(0)+λu(u<10 km/s,λ=1.32)in a low pressure region,is approximately parallel with the fitted D^u(λ=1.36)of liquid helium from the experimental data of Nellis et al.Our calculations show that the Hugoniot parameterλis independent of the initial densityρ_(0).The D^u curves of gas helium will transfer to another one and approach a limiting value of compression when their temperature elevates to about 18000 K and the ionization degree of the shocked gas helium reaches 10^(-3).
