Fig.1

Pictures of air-breathing hypersonic vehicle［1］

Fig.2

Combustion enhancement method for hypersonic vehicle ［3］

Fig.3

Quasi-direct current trans-cavity discharge device［28］

Fig.4

Ignition process of ethylenefuel enhanced by spark discharge at Ma=2［33］

Fig.5

Ignition process of ethylene fuel enhanced by spark discharge and pulse detonation in scramjet combustor at Ma=2［34］

Fig.6

Gliding arc enhanced scramjet combustor ignition［47］

Fig.7

Ignition process of ethylene fuel enhanced by gliding arc discharge in scramjet combustor at Ma=2.92［50］

Fig.8

Ignition process of kerosene enhanced by gliding arc discharge in scramjet combustor at Ma=2.92［51］

Table 1

Summary of research results on electric excitation enhanced scramjet combustor ignition

Fig.9

Supersonic flame flashback phenomenon［64］

Fig.10

Supersonic combustion regulated by quasi-direct current excitation at Ma=2［78］

Fig.11

Experimental phenomenon of electric excitation suppressing conversion of cavity flame stabilization mode to cavity shear⁃layer mode［79］

Fig.12

CH* chemical spontaneous emission and synchronous schlieren images of supersonic combustion controlled by electric excitation［80］

Fig. 13

Effect of microwave and microwave enhanced gliding arc electric excitation on combustion mode control ［82］

Fig.14

Injection-discharge electrode integrated device and discharge-combustion coupling oscillation experimental phenomenon ［85］

Fig. 15

Suppression of combustion oscillation by electric excitation［52］

Fig.16

Suppression of supersonic flame flashback by gliding arc ［80］

Table 2

Summary of research results on electric excitation control of scramjet combustion state

Fig.17

Flame stabilization range and blow-out limit of kerosene flame at different total temperatures［91］

Fig.18

Quasi-direct current discharge assisted enhanced combustion［94］

Fig.19

Double N2 plasma torch assisted flame stabilization［96］

Fig.20

Combined combustion control of plasma torch and dielectric barrier discharge［97］

Fig.21

OH-PLIF and schlieren overlay images under pure oxygen mainstream［99］

Fig.22

Gliding arc assisted combustion enhancement ［47］

Fig.23

Gliding arc assisted flame stabilization and combustion［52］

Fig. 24

Broadening of combustion limit by gliding arc［100］

Fig.25

Two main modes of electric excitation broadening flame extinction limit［100］

Fig.26

Maintenance of flame stability near lean blow-off limit by multi-channel gliding arc

Table 3

Summary of research results on combustion and flame stabilization of scramjet combustor enhanced by electric excitation

Fig.27

Development trend of plasma combination control