Clogged Ear Sensation After Rhinoplasty?

This is not a common occurence and is more likely related to oropahryngeal and nasopahryngeal swelling that occurs with surgery and sometimes is associated with intubation or laryngeal mask anesthesia.
It generally lasts no longer than 7-10 days and is sometimes treated with decongestants or steroid preparations if severe.
There is no definite way to prevent this.

This is normal and goes away in a week or two. If you are going to fly during this time use a decongestant nasal spray 10 minutes prior to descent. 

 Sometimes, after surgery,  you can get fluid behind the ear-drum that is related to general anesthesia, and placing the oral-tracheal breathing tube. If you're having a clogged ear after rhinoplasty, then see your surgeon, or consult a board-certified ENT for evaluation and treatment.
Best regards.