Jayaram, who had won the Dutch Open last year, defeated Yuhan 21-7 21-23 21-19 in a 50-minute men's singles match, his fourth win over the Belgium shuttler.
The 27-year-old from Bangalore will next take on Chinese Taipei's Tzu Wei Wang, seeded 13th, in the tournament.
Top seed K Srikanth, Anand Pawar and B Sai Praneeth also reached the prequarterfinals.
Among other Indians, men's doubles pair of Pranaav Jerry Chopra and Akshay Dewalkar lost 17-21 13-21 to Indonesian combo of Angga Pratama and Ricky Karanda Suwardi.