Do Narasimha avatar of Vishnu has any wife? If yes, what is the name of the wife of Narasimha?
I am writing this brief answer based on Pancaratra tradition of Vaishnavism. This wisdom Library page is indicating that the consort of Narasimha Avatara of Lord vishnu is an aspect of goddess Laxami called as Vidyuta.
Nṛsiṃha (नृसिंह, “Man-lion form”):—One of the twenty-four forms of Viṣṇu through which Nārāyaṇa manifests himself. The meaning of this title is “The one who assumes the celestial man-lion form”. He is accompanied by a counterpart emanation of Lakṣmī (an aspect of Devī) who goes by the name Vidyutā.
Vidyutā (विद्युता, “flashing, glittering”):—One of the twenty-four emanations of Lakṣmī accompanying Nārāyaṇa. This particular manifestation couples with his counterpart form called Nṛsiṃha and together they form the twenty-first celestial couple. Lakṣmī represents a form of the Goddess (Devī) as the wife of Viṣṇu, while Nārāyaṇa represents the personification of his creative energy, according to the Pāñcarātra literature.