Fig. 1. Multi-functional applications of surface micro-textures in the aerospace field

Fig. 2. Number of academic papers for surface textures based on Web of Science search results

Fig. 3. morphology of different surface micro-textures^［18］

Fig. 4. Stribeck curve for lubrication states

Fig. 5. Mechanism diagram for friction reduction

Fig. 6. Typical applications of micro-textures in the aerospace field^{［33，40，42］}

Fig. 7. Applications of bionic structures to aircraft wings and blades

Fig. 8. Schematic diagrams of three drag reduction theories

Fig. 9. Variation of the instantaneous flow field at different angles

Fig. 10. Mechanism of drag reduction by micro-textures on the blade surface^［58］

Fig. 11. Examples of surface micro-mixtures in enhancing convection，thermal radiation，and heat conduction

Fig. 12. Morphology of the surface micro-structures of the thermal management application examples in the aerospace field

Fig. 13. MNH micro-nano structure based on the surface feature of fargesia qinlingensis leaves^［92］

Fig. 14. Method for the contact time reduction of impact droplets by macro-structure design^［93-94］

Fig. 15. Structure of an aircraft wing surface before and after heating

Fig. 16. Self-cleaning mechanism of surface micro-textures

Fig. 17. Micro-structures of self-cleaning surfaces

Fig. 18. Application of surface micro-textures to lunar rover self-cleaning