SQL Server 2016 Availability Groups Named Pipes?
From the documentation on Listeners, Client Connectivity, Application Failover


  An availability group listener consists of a Domain Name System (DNS)
  listener name, listener port designation, and one or more IP
  addresses. Only the TCP protocol is supported by availability group
  listener. The DNS name of the listener must also be unique in the
  domain and in NetBIOS.


So only TCP/IP is supported.