Investigation on Broadening Compressor Surge Margin by Using Active Magnetic Bearing

Figure 3

Overall performance maps of pressure ratio and efficiency over CR. (a) Pressure ratio over mass flow rate. (b) Polytropic efficiency versus mass flow rate. (c) Pressure ratio over clearance ratio. (d) Polytropic efficiency over clearance ratio.

(a)

(b)

(c)

(d)